Question

3 уравнения 7 класс. Пожалуйста помагите

Answer 1

1) 5x + 3x - 3 = 6x + 11
8x - 6x = 11 + 3
2x = 14
x = 14/2
x = 7

2) 20x = 19 - 3 - 12x
20x + 12x = 16
32x = 16
x= 16/32
x = 1 / 2
x = 0,5

3) x - 7 - 2x - 9 = - 13
- x - 16 = - 13
- x = - 13 + 16
- x = 3
x = - 3