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2x - 8 = 3x + 3
-3 -8 = 3x - 2x
-11 = x
b) 17 - x = 2x -1
17 + 1 = 2x + x
18 = 3x
18/3 = x
6 = x
c) 8 - 4x = 3 (5 - x)
8 - 4x = 15 - 3x
8 - 15 = 3x + 4x
-7 = 7 x
-7/7 = x
-1 = x