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31.36=x0.15
We move all terms to the left:
31.36-(x0.15)=0
We add all the numbers together, and all the variables
-(+x0.15)+31.36=0
We get rid of parentheses
-x0.15+31.36=0
We move all terms containing x to the left, all other terms to the right
-x0.15=-31.36
x=-31.36/1
x=-31.36
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