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42.5=-5(x)+55
We move all terms to the left:
42.5-(-5(x)+55)=0
We get rid of parentheses
5x-55+42.5=0
We add all the numbers together, and all the variables
5x-12.5=0
We move all terms containing x to the left, all other terms to the right
5x=12.5
x=12.5/5
x=2+2.5/5
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