5( x + 6) = 2x
5x + 30 = 2x
5x - 2x = - 30
3x = - 30
x = - 30/3
x = - 10
6( x - 3) = 2 ( 3x + 8)
6x - 18 = 6x + 16
6x - 6x = 18 + 16
0x = 34 - решений нет,так как на 0 делить нельзя.Корней нет.
2( 6 - 2x) = 3( 7 - 4x)
12 - 4x = 21 - 12x
- 4x + 12x = - 12 + 21
8x = 9
x = 9/8
x = 1,125
5( x + 5) = 3( x + 3)
5x + 25 = 3x + 9
5x - 3x = - 25 + 9
2x = - 16
x = - 16/2
x = - 8