Answer:
x = -5
Step-by-step explanation:
Collect terms:
-3x -3 = 12
Divide by -3:
x +1 = -4
Subtract 1:
x = -5
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The more conventional solution method would be to save the division by -3 until the end. The second step could be to add 3 to both sides. Then you would have ...
-3x = 15
and dividing by -3 would give the same answer.
