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17.5=15+2x
We move all terms to the left:
17.5-(15+2x)=0
We add all the numbers together, and all the variables
-(2x+15)+17.5=0
We get rid of parentheses
-2x-15+17.5=0
We add all the numbers together, and all the variables
-2x+2.5=0
We move all terms containing x to the left, all other terms to the right
-2x=-2.5
x=-2.5/-2
x=1+0.5/2
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