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X-7=3(3X-4)
We move all terms to the left:
X-7-(3(3X-4))=0
We calculate terms in parentheses: -(3(3X-4)), so:We get rid of parentheses
3(3X-4)
We multiply parentheses
9X-12
Back to the equation:
-(9X-12)
X-9X+12-7=0
We add all the numbers together, and all the variables
-8X+5=0
We move all terms containing X to the left, all other terms to the right
-8X=-5
X=-5/-8
X=5/8
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