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7(x+13)=5(4x+13)
We move all terms to the left:
7(x+13)-(5(4x+13))=0
We multiply parentheses
7x-(5(4x+13))+91=0
We calculate terms in parentheses: -(5(4x+13)), so:We get rid of parentheses
5(4x+13)
We multiply parentheses
20x+65
Back to the equation:
-(20x+65)
7x-20x-65+91=0
We add all the numbers together, and all the variables
-13x+26=0
We move all terms containing x to the left, all other terms to the right
-13x=-26
x=-26/-13
x=+2
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