2 answers:
Answer:
A
Step-by-step explanation:
3x=x-12
plug in 3 for x
3(3)=(3)-12
9=-9
Answer:
Let the number be X;
From the statement, X-12=3(-X)
Collecting the like terms, X+3X =12
4X=12
Dividing both sides by 4
X=3
Step-by-step explanation:
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