| Atbilžu arhīvs | № 20567, Algebra, 8 klase Raznost dvuh uglov parallelogramma ravna 34gradusa. Vi4eslite ugli parallelogramma | | |
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≈√vp_idb_insp‰ | х - один угол у - второй угол в паралелограмме сумма двух смежных углов х+у=180 градусов => x=180-y
по заданию х-у=34 градуса => 180-2y=34 => 180-34=2y => y=73 => x=180-73=107 Ответ: 107 и 73 | |
| | № 20573, Algebra, 7 klase 32(2x-5)-5(3x+2) | | |
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Nik | 64x-160-15x-10=0 49x=170 x=primerno 3.5(kaut kur) | | |
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akulla | 32*(2x-5)-5*(3x+2)= =32*2x-32*5-5*3x+5*2= =64x-160-15x+10= =49x-150 <----ответ | | |
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glaz | 49x-150 | | |
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AndR | 32(2x-5)-5(3x+2)= =64x-160-15x-10= =49x-170 | | |
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≈√vp_idb_insp‰ | 32(2x-5)-5(3x+2)=64x-160-15x-10=49x-170 | |
| № 20574, Algebra, 7 klase 2x(-2,5)-12 | | |
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mila6a4ka | =-5-12=-17 | | |
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glaz | -5x-12 | | |
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AndR | 2x(-2,5)-12=-5x-12 | | |
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КристЯ | 2x(-2,5)-12 -5х-12=0 -5х=12 -х=2,4 х=-2,4 | | |
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≈√vp_idb_insp‰ | 2x(-2,5)-12=-5x-12 | |
| № 20580, Algebra, 7 klase Одно число в 7 раз больше другого, а сумма обоих чисел равна 11.2. Найдите эти числа | | |
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AndR | x+7x=11,2 8x=11,2 x=1,4 1,4 и 9,8 | | |
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Nik | x+x+7=11.2 2x=11.2-7 2x=4.2 x=2.1 | | |
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akulla | 11.2 /7=(то число которое тебе нужно) | | |
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Ver4eg_per4eg | x-1 oe 4islo, 7x-2 oe 4islo, x+7x=11.2 8x=11.2, x=1.4 7x=9.8 | | |
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Anjutik | x+7x=11,2 8x=11,2 x=11,2:8 x=1,4 Otvet: 1,4 i 9,8 | |
| № 20607, Algebra, 7 klase -2a*3 -b*4 -7*(-a) 4*(-x) -3.5*(-m) 2.4*(-2x) 1.5k*(-0.7) 2.5a*4*3 (-2c)*0.5*4
* <---умножение | | |
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ORANGE | -2a*3=-6a -b*4=-4b -7*(-a)=7a 4*(-x)=-4x -3.5*(-m)=3.5m 2.4*(-2x)=-4.8 1.5k*(-0.7)=-1.05k 2.5a*4*3=30a (-2c)*0.5*4=-c | | |
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Vlad | -6a -4b 7a -4x 3.5m -4.8x -1.05k 30a -16c | | |
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glaz | -6a -4b 7a -4x 3.5m -4.8x -1.05k 30a -4c | | |
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≈√vp_idb_insp‰ | 2a*3 = 6a -b*4 = -4b -7*(-a) = 7a 4*(-x) = -4x -3.5*(-m) = 3,5m 2.4*(-2x) = -4,8x 1.5k*(-0.7) = -1,05k 2.5a*4*3 = 30a (-2c)*0.5*4 = -4c | | |
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AndR | -2a*3=-6a -b*4=-4b -7*(-a)=7a 4*(-x)=-4x -3.5*(-m)=3,5m 2.4*(-2x)=-4,8x 1.5k*(-0.7)=-1,05k 2.5a*4*3=30a (-2c)*0.5*4=-4c | |
| | № 20635, Algebra, 7 klase 4(m - n) = 4m - 3(a + b) = -2(d + c) = -0,3(u - v) = 5(d - 2) = 4(3x + 2x) = -(x - 7) = (x - 1) * 10 = (5 - 4y) *(-3) = (-m -6) *(-2) = 7 *(1,2 - 2b) = -0,4 *(0,1b - 10) =
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ORANGE | 4m-4n 3a+3b -2d-2c -0.3u+0.3v 5d-10 12x+8x -x+7 10x-10 -15+12y 2m+12 8.4-14b *0.04b+4 | | |
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glaz | 4m-4n 3a+3b -2d-2c -0.3u-0.3v 5d-10 12x+8x -x+7 10x-10 -15+12y 2m+12 8.4-14b -0.04b+4 | | |
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AndR | 4m - 4n 3a +3b -2d - 2c -0,3u + 0,3v 5d - 10 20x 7-x 10x - 10 12y - 15 2m + 12 8,4 - 14b 4 - 0,04b | | |
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≈√vp_idb_insp‰ | 1) 4m - 4n 2) 3a +3b 3) -2d - 2c 4) 0,3v - 0,3u 5) 5d - 10 6) 12x + 8x 7) 7-x 8) 10x - 10 9) 12y - 15 10) 2m + 12 11) 8,4 - 14b 12) 4 - 0,04b | | |
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An4ous | 1.=4m-4n 2.3a+3b 3,-2d-2c 4.-0.3u+0.3v 5.5d-10 6.20x 6.-x+7 7.10x-10 8.-15+12y 9.2m+12 10.8.4-14b 11.-0.04b+4 | |
| № 20641, Algebra, 7 klase 0,2(5 - 10y) - 4 + 5y= 12x - 14b - 3(4x - 4b)= -2(x - 3) + 5(2 - 3x)= -(k - 7m) + (3m - k)*2= -2(x - 2y + 2a) - (5a + y +2x)= (2b - 3c + d)*5 - 5(2b + 3c - 1)= | | |
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baby | 0,2(5 - 10y) - 4 + 5y=1-2y-4+5y=-3+3y 12x - 14b - 3(4x - 4b)=12x-14b-12x+12b=-2b -2(x - 3) + 5(2 - 3x)=-2x+6+10-15x=16-13x -(k - 7m) + (3m - k)*2=-k+7m+6m-2k=-3k+13m -2(x - 2y + 2a) - (5a + y +2x)=-2x+4y-4a-5a-y-2x=3y-9a (2b - 3c + d)*5 - 5(2b + 3c - 1)=10b-15c+5d-10b-15c+5=-30c+5d+5
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≈√vp_idb_insp‰ | 1) =1-2y-4+5y=3y-3 2) =12x-14b-12x+12b=-2b 3) =6-2x+10-15x=16-17x 4) =7m-k+6m-2k=13m-3k 5) -2x+4y-4a-5a-y-2x=3y-4x-9a 6) =10b-15c+5d-10b-15c+5=5d+5-30c | | |
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ORANGE | ...=1-2y-4+5y=-3+3y ...=12x-14b-12x+12b=-2b ...=-2x+6+10-15x=-17x+16 ...=-k+7m+6m-2k=-3k+13m ...=-2x+4y-4a-5a-y-2x=-4x+3y-9a ...=10b-15c+5d-10b-15c+5=-30c+5d+5 | | |
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Sergikkk | 1) 1-2y 2) 12x-14b-12x+12b=-2b (tak kak, 12x - vzaimno unichtozhili) 3) -2x+6+10-15x=-17x+16 4) -k+7m+6m-2k=-3k+13k 5) -2x+4y-4a-5a-y-2x=-4x+3y-9a 6) 10b-15c+5d-10b-15c+5=-30c+5d+5 | |
| № 20658, Algebra, 7 klase 6x+1+7x+7-x+2 | | |
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КристЯ | 6x+1+7x+7-x+2=0 12х+10=0 12х=-10 х=10/12 | | |
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MrNumbers | 12x+10 | | |
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Sergikkk | 6x+1+7x+7-x+2=12x+10 | | |
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AndR | 6x+1+7x+7-x+2 = 12x+10 | | |
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Vlad | 6x+1+7x+7-x+2=12x+3 | |
| № 20659, Algebra, 7 klase 2(a+3)+3(a-2) | | |
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glaz | 2a+6+3a-6= =5a | | |
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baby | 2(a+3)+3(a-2)=2a+6+3a-6=5a | | |
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AndR | 2(a+3)+3(a-2) = 2a+6+3a-6 = 5a | | |
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Anjutik | Raskrivaem skobki 2a +6 +3a-6 +6 i -6 vzaimno sokratim Otvet = 5a | | |
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smile | РАСКРЫВАЕМ СКОБКИ 2а+6+3а-6 ВЗАИМНО УНИЧТОЖАЕМ 2а+3а 5а -вот те и ответ | |
| | № 20663, Algebra, 7 klase -2(x - 3) + 5(2 - 3x)= | | |
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≈√vp_idb_insp‰ | -2(x - 3) + 5(2 - 3x)=-2x+6+10-15x=16-17x | | |
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glaz | -2x+6+10-15x -17x+16 | | |
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baby | -2(x - 3) + 5(2 - 3x)=-2x+6+10-15x=-17x+16 | | |
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AndR | -2(x - 3) + 5(2 - 3x)= =-2x+6+10-15x = -17x+16 | | |
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Anjutik | Raskroem skobki: -2x+6+10-15x= -17x+16 Neizvestnoe perenesem vlevo -17x=-16 Obe chasti umnozaem na -1 17x=16 Videljaem celuju chastj x=1 1/16 | |
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