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12.5=3.5-5x
We move all terms to the left:
12.5-(3.5-5x)=0
We add all the numbers together, and all the variables
-(-5x+3.5)+12.5=0
We get rid of parentheses
5x-3.5+12.5=0
We add all the numbers together, and all the variables
5x+9=0
We move all terms containing x to the left, all other terms to the right
5x=-9
x=-9/5
x=-1+4/5
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