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18=6x+2(-x-5)
We move all terms to the left:
18-(6x+2(-x-5))=0
We add all the numbers together, and all the variables
-(6x+2(-1x-5))+18=0
We calculate terms in parentheses: -(6x+2(-1x-5)), so:We get rid of parentheses
6x+2(-1x-5)
We multiply parentheses
6x-2x-10
We add all the numbers together, and all the variables
4x-10
Back to the equation:
-(4x-10)
-4x+10+18=0
We add all the numbers together, and all the variables
-4x+28=0
We move all terms containing x to the left, all other terms to the right
-4x=-28
x=-28/-4
x=+7
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