2 answers:
3(x - 1) = 2x + 9
3x - 3 = 2x + 9
3x (-2x) -3 (+3) = 2x (-2x) + 9 (+9)
(3x -2x) = (9 + 9)
(x) = (18)
x = 18
x = 18 is your answer
hope this helps
Here's the way to get the answer.
1) 3x - 3 = 2x + 9
+3 +3
2) 3x = 2x + 12
-2x -2x
3) x = 12
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