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-4=8+4x-8x
We move all terms to the left:
-4-(8+4x-8x)=0
We add all the numbers together, and all the variables
-(-4x+8)-4=0
We get rid of parentheses
4x-8-4=0
We add all the numbers together, and all the variables
4x-12=0
We move all terms containing x to the left, all other terms to the right
4x=12
x=12/4
x=3
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