180=(7x+18)+(12x-9)

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Solution for 180=(7x+18)+(12x-9) equation:



180=(7x+18)+(12x-9)
We move all terms to the left:
180-((7x+18)+(12x-9))=0
We calculate terms in parentheses: -((7x+18)+(12x-9)), so:
(7x+18)+(12x-9)
We get rid of parentheses
7x+12x+18-9
We add all the numbers together, and all the variables
19x+9
Back to the equation:
-(19x+9)
We get rid of parentheses
-19x-9+180=0
We add all the numbers together, and all the variables
-19x+171=0
We move all terms containing x to the left, all other terms to the right
-19x=-171
x=-171/-19
x=+9

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