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12+4x-8x=-7x+2x
We move all terms to the left:
12+4x-8x-(-7x+2x)=0
We add all the numbers together, and all the variables
4x-8x-(-5x)+12=0
We add all the numbers together, and all the variables
-4x-(-5x)+12=0
We get rid of parentheses
-4x+5x+12=0
We add all the numbers together, and all the variables
x+12=0
We move all terms containing x to the left, all other terms to the right
x=-12
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