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-216=8(5x+18)
We move all terms to the left:
-216-(8(5x+18))=0
We calculate terms in parentheses: -(8(5x+18)), so:We get rid of parentheses
8(5x+18)
We multiply parentheses
40x+144
Back to the equation:
-(40x+144)
-40x-144-216=0
We add all the numbers together, and all the variables
-40x-360=0
We move all terms containing x to the left, all other terms to the right
-40x=360
x=360/-40
x=-9
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