1) 7(x + 4) = −28 2) 35 = −5(2x − 1) 3) 9(−3x + 12) = 81

Question

1) 7(x + 4) = −28 2) 35 = −5(2x − 1) 3) 9(−3x + 12) = 81

Answer 1

Ответ:

1) 7(x + 4) = −28

7х + 28 = - 28

7х = - 28 - 28

х = - 56: 7

х = 8

2) 35 = −5(2x − 1)

35 = - 10х + 5

10х = 5 - 35

10х = - 30

х = -3

3) 9(−3x + 12) = 81

- 27х + 108 = 81

- 27х = 81 - 108

- 27х = - 27

х = 1