1) 2x-9=x+18

2) -2x + 10 = x - 989

3) x + 5 = 2x - 80

4) 5.(2x - 1) - 10 = 235

5) x ÷ (-2) + 8 = -88

6) 4x - 4 = 3x + 6

7) -4.(-x + 10) = (4x + 60) ÷ 2

8) 5x + 4 +3x + 4 = 8 + 4x