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-13x-52.5+23x=0.75(18x+42)
We move all terms to the left:
-13x-52.5+23x-(0.75(18x+42))=0
We add all the numbers together, and all the variables
10x-(0.75(18x+42))-52.5=0
We calculate terms in parentheses: -(0.75(18x+42)), so:We get rid of parentheses
0.75(18x+42)
We multiply parentheses
13.5x+31.5
Back to the equation:
-(13.5x+31.5)
10x-13.5x-31.5-52.5=0
We add all the numbers together, and all the variables
-3.5x-84=0
We move all terms containing x to the left, all other terms to the right
-3.5x=84
x=84/-3.5
x=-24
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