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3x-13=2(x+13)
We move all terms to the left:
3x-13-(2(x+13))=0
We calculate terms in parentheses: -(2(x+13)), so:We get rid of parentheses
2(x+13)
We multiply parentheses
2x+26
Back to the equation:
-(2x+26)
3x-2x-26-13=0
We add all the numbers together, and all the variables
x-39=0
We move all terms containing x to the left, all other terms to the right
x=39
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