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22.5=18(x-9)
We move all terms to the left:
22.5-(18(x-9))=0
We calculate terms in parentheses: -(18(x-9)), so:We get rid of parentheses
18(x-9)
We multiply parentheses
18x-162
Back to the equation:
-(18x-162)
-18x+162+22.5=0
We add all the numbers together, and all the variables
-18x+184.5=0
We move all terms containing x to the left, all other terms to the right
-18x=-184.5
x=-184.5/-18
x=10+1.8/7.2
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