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3.2=5x+2.5x
We move all terms to the left:
3.2-(5x+2.5x)=0
We add all the numbers together, and all the variables
-(+7.5x)+3.2=0
We get rid of parentheses
-7.5x+3.2=0
We move all terms containing x to the left, all other terms to the right
-7.5x=-3.2
x=-3.2/-7.5
x=2.6666666666667/6.25
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