5(2x-3) - (8x - 7) =12 – 2x
10x - 15 - 8x + 7 = 12 - 2x
2x - 8 = 12 - 2x
2x + 2x = 12 + 8
4x = 20
x = 20 : 4
x = 5
Ответ: x = 5