Question

Решите линейные уравнения: 2 (7+9x) = -6x+24 (2-3x) = -7x+1010+9 (-10-9x) = 8-x-1-4 (-7+8x)= -2x-66x - 8 (-7+9x) = -2x-8

Answer 1

2 (7+9x) = -6x+2
14+18x + 6x -2 =0
24x +12 =0
12(2x+1) =0
2x+1 =0
x= -1/2

4 (2-3x) = -7x+10
8 - 12x +7x -10 =0
-5x -2 =0
5x =-2
x = - 2/5

10+9 (-10-9x) = 8-x
10 - 90 - 81x -8 +x = 0
-88 -80x =0
80x = -88
x = - 1,1

-1-4 (-7+8x)= -2x-6
-1 +28 -32x + 2x +6 =0
33 -30x = 0
33 = 30x
x = 1,1

6x - 8 (-7+9x) = -2x-8
6x +56 -72x +2x +8 = 0
-64x + 64 =0
64x =64
x = 1