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(12x+13)=(7x-13)
We move all terms to the left:
(12x+13)-((7x-13))=0
We get rid of parentheses
12x-((7x-13))+13=0
We calculate terms in parentheses: -((7x-13)), so:We get rid of parentheses
(7x-13)
We get rid of parentheses
7x-13
Back to the equation:
-(7x-13)
12x-7x+13+13=0
We add all the numbers together, and all the variables
5x+26=0
We move all terms containing x to the left, all other terms to the right
5x=-26
x=-26/5
x=-5+1/5
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