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4x+18=7(x+13)
We move all terms to the left:
4x+18-(7(x+13))=0
We calculate terms in parentheses: -(7(x+13)), so:We get rid of parentheses
7(x+13)
We multiply parentheses
7x+91
Back to the equation:
-(7x+91)
4x-7x-91+18=0
We add all the numbers together, and all the variables
-3x-73=0
We move all terms containing x to the left, all other terms to the right
-3x=73
x=73/-3
x=-24+1/3
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