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7=2.5x
We move all terms to the left:
7-(2.5x)=0
We add all the numbers together, and all the variables
-(+2.5x)+7=0
We get rid of parentheses
-2.5x+7=0
We move all terms containing x to the left, all other terms to the right
-2.5x=-7
x=-7/-2.5
x=2+1/1.25
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