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X=12.5X+30
We move all terms to the left:
X-(12.5X+30)=0
We get rid of parentheses
X-12.5X-30=0
We add all the numbers together, and all the variables
-11.5X-30=0
We move all terms containing X to the left, all other terms to the right
-11.5X=30
X=30/-11.5
X=-2+7/11.5
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