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8x+12=2x-28
We move all terms to the left:
8x+12-(2x-28)=0
We get rid of parentheses
8x-2x+28+12=0
We add all the numbers together, and all the variables
6x+40=0
We move all terms containing x to the left, all other terms to the right
6x=-40
x=-40/6
x=-6+2/3
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