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-7x+5x=-12x
We move all terms to the left:
-7x+5x-(-12x)=0
We add all the numbers together, and all the variables
-2x-(-12x)=0
We get rid of parentheses
-2x+12x=0
We add all the numbers together, and all the variables
10x=0
x=0/10
x=0
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