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X-1=3(X+3)
We move all terms to the left:
X-1-(3(X+3))=0
We calculate terms in parentheses: -(3(X+3)), so:We get rid of parentheses
3(X+3)
We multiply parentheses
3X+9
Back to the equation:
-(3X+9)
X-3X-9-1=0
We add all the numbers together, and all the variables
-2X-10=0
We move all terms containing X to the left, all other terms to the right
-2X=10
X=10/-2
X=-5
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