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X=30-1.5X
We move all terms to the left:
X-(30-1.5X)=0
We add all the numbers together, and all the variables
X-(-1.5X+30)=0
We get rid of parentheses
X+1.5X-30=0
We add all the numbers together, and all the variables
2.5X-30=0
We move all terms containing X to the left, all other terms to the right
2.5X=30
X=30/2.5
X=12
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