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