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8x-30=2x+54
We move all terms to the left:
8x-30-(2x+54)=0
We get rid of parentheses
8x-2x-54-30=0
We add all the numbers together, and all the variables
6x-84=0
We move all terms containing x to the left, all other terms to the right
6x=84
x=84/6
x=14
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