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55=x+(x+3)
We move all terms to the left:
55-(x+(x+3))=0
We calculate terms in parentheses: -(x+(x+3)), so:We get rid of parentheses
x+(x+3)
We get rid of parentheses
x+x+3
We add all the numbers together, and all the variables
2x+3
Back to the equation:
-(2x+3)
-2x-3+55=0
We add all the numbers together, and all the variables
-2x+52=0
We move all terms containing x to the left, all other terms to the right
-2x=-52
x=-52/-2
x=+26
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