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0.5x+117=88.5
We move all terms to the left:
0.5x+117-(88.5)=0
We add all the numbers together, and all the variables
0.5x+28.5=0
We move all terms containing x to the left, all other terms to the right
0.5x=-28.5
x=-28.5/0.5
x=-57
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