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5x+8-2x=2x+12
We move all terms to the left:
5x+8-2x-(2x+12)=0
We add all the numbers together, and all the variables
3x-(2x+12)+8=0
We get rid of parentheses
3x-2x-12+8=0
We add all the numbers together, and all the variables
x-4=0
We move all terms containing x to the left, all other terms to the right
x=4
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