Question

1) 2х=18-х 2) 7х + 3 = 30-2х 3) 7-2х=3х-18 4) 3(х-2)=х+2 5)5-2(х-1)=Х+2

Answer 1

1) 2x = 18 - x

2x + x = 18

3x = 18

x = 6

2) 7x + 3 = 30 - 2x

7x + 2x = 30 - 3

9x = 27

x = 3

3) 7 - 2x = 3x - 18

-2x - 3x = -18 - 7

2x + 3x = 18 + 7

5x = 25

x = 5

4) 3 (x - 2) = x + 2

3x - 6 = x + 2

3x - x = 2 + 6

2x = 8

x = 4

5) 5 - 2 (x - 1) = x + 2

5 - 2x + 2 = x + 2

- 2x - x = 2 - 2 - 5

-3x = -5

3x = 5

x = 5/3