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(4x-55)+(x+5)=(7x-130)
We move all terms to the left:
(4x-55)+(x+5)-((7x-130))=0
We get rid of parentheses
4x+x-((7x-130))-55+5=0
We calculate terms in parentheses: -((7x-130)), so:We add all the numbers together, and all the variables
(7x-130)
We get rid of parentheses
7x-130
Back to the equation:
-(7x-130)
5x-(7x-130)-50=0
We get rid of parentheses
5x-7x+130-50=0
We add all the numbers together, and all the variables
-2x+80=0
We move all terms containing x to the left, all other terms to the right
-2x=-80
x=-80/-2
x=+40
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