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0.35x-18.5=-15
We move all terms to the left:
0.35x-18.5-(-15)=0
We add all the numbers together, and all the variables
0.35x-3.5=0
We move all terms containing x to the left, all other terms to the right
0.35x=3.5
x=3.5/0.35
x=10
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