Question

Розв’яжи рівняння:
1) 4(x – 2) = –5x;
2) –(4x – 7) = –7x;
3) –6(x – 1) = 13;
4) 2(x + 1) = 9(x – 3).​

Answer 1

Ответ:

1. 4(x – 2) = –5x
4x - 8 = -5x

4x + 5x = 8

9x = 8

x = 8/9

2. –(4x – 7) = –7x

-4x + 7 = -7x

-4x + 7x = 7

3x = 7

x = 7/3

3. –6(x – 1) = 13

-6x + 6 = 13

-6x = 13 - 6

-6x = 7

x = -7/6

4. 2(x + 1) = 9(x – 3)

2x + 2 = 9x - 27

2x - 9x = -27 - 2

-7x = -29

x = (-29)/(-7)

x = 29/7