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12=-5x+4+3
We move all terms to the left:
12-(-5x+4+3)=0
We add all the numbers together, and all the variables
-(-5x+7)+12=0
We get rid of parentheses
5x-7+12=0
We add all the numbers together, and all the variables
5x+5=0
We move all terms containing x to the left, all other terms to the right
5x=-5
x=-5/5
x=-1
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