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X+1=3(X-15)
We move all terms to the left:
X+1-(3(X-15))=0
We calculate terms in parentheses: -(3(X-15)), so:We get rid of parentheses
3(X-15)
We multiply parentheses
3X-45
Back to the equation:
-(3X-45)
X-3X+45+1=0
We add all the numbers together, and all the variables
-2X+46=0
We move all terms containing X to the left, all other terms to the right
-2X=-46
X=-46/-2
X=+23
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