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39 - 6x = 9x - x + 7
-6x - 8x =7 - 39
- 14x = - 32
x = 32/14 = 16/7
b. 3(2x - 3) - 2 (1 - x) - ( x + 1) = 0
6x - 9 - 2 + 2x - x - 1 = 0
6x + 2x - x = 9 + 2 + 1
7x = 12
x = 12/7