Tìm x, biết rằng (2x – 5) + 17 = 6

Baøi 11:   Tìm x:

1/     (2x – 5) + 17 = 6

2/     10 – 2(4 – 3x) = -4

3/     - 12 + 3(-x + 7) = -18

4/     24 : (3x – 2) = -3

5/     -45 : 5.(-3 – 2x) = 3

6/     x.(x + 7) = 0

7/     (x + 12).(x-3) = 0

8/     (-x + 5).(3 – x ) = 0