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688=18(x+4)
We move all terms to the left:
688-(18(x+4))=0
We calculate terms in parentheses: -(18(x+4)), so:We get rid of parentheses
18(x+4)
We multiply parentheses
18x+72
Back to the equation:
-(18x+72)
-18x-72+688=0
We add all the numbers together, and all the variables
-18x+616=0
We move all terms containing x to the left, all other terms to the right
-18x=-616
x=-616/-18
x=34+2/9
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