125. Решите уравнения: a) 7x-3(x+4)=22-6x; в) 8x-9(3-2x)=10x-11.

Решение:

• а) 7x - 3(x + 4) = 22 - 6x
1. 7x - 3x - 12 = 22 - 6x
2. 4x - 12 = 22 - 6x
3. 4x + 6x = 22 + 12
4. 10x = 34
5. x = 34 / 10
6. x = 17/5
• в) 8x - 9(3 - 2x) = 10x - 11
1. 8x - 27 + 18x = 10x - 11
2. 26x - 27 = 10x - 11
3. 26x - 10x = -11 + 27
4. 16x = 16
5. x = 16 / 16
6. x = 1

Ответ: а) 17/5; в) 1.