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-12=5x-12x
We move all terms to the left:
-12-(5x-12x)=0
We add all the numbers together, and all the variables
-(-7x)-12=0
We get rid of parentheses
7x-12=0
We move all terms containing x to the left, all other terms to the right
7x=12
x=12/7
x=1+5/7
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