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3.5=125-5x
We move all terms to the left:
3.5-(125-5x)=0
We add all the numbers together, and all the variables
-(-5x+125)+3.5=0
We get rid of parentheses
5x-125+3.5=0
We add all the numbers together, and all the variables
5x-121.5=0
We move all terms containing x to the left, all other terms to the right
5x=121.5
x=121.5/5
x=24+1/3.3333333333333
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