Question

Решите уравнение: 1)-3y-9y+5y=2.1 2)-2.4m+3.8m+1.2m=-0.052 3)-3/7a+5/6a-8/21a=-1/49 4)-8 7/16c+10 19/24c-3 3/8c=-3 1/16 5)2.3x-(-7.2)*x+x*(-1.5)=-2.4 6)3.4y+y*(-8.1)-(-2.2)*y=-10

Answer 1

1. -3у-9у+5у=2,1
    -7у=2,1
     у=2,1:(-7)
     у=-0,3
2. -2.4m+3.8m+1.2m=-0.052
     2.6m=-0.052
     m=-0.052:.,6
     m=-0.02

Answer 2

1) -3y - 9y + 5y = 2 -7y = 2 y = -2/7

2) -2.4m + 3.8m + 1.2m = -0.052 2.6m = -0.052 m = -0.052 / 2.6 m = -0.02

3) -3/7a + 5/6a - 8/21a = -1/49 (-18a + 35a - 8a) / 42 = -1/49 9a / 42 = -1/49 a = (-1/49) * (42/9) a = -14/27

4) -8 + 7/16c + 10 + 19/24c - 3 + 3/8c = -3 + 1/16 -1 + 7/16c + 19/24c + 3/8c = -3 + 1/16 7/16c + 19/24c + 3/8c = -2 + 1/16 (21