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3=7.5(x)
We move all terms to the left:
3-(7.5(x))=0
We add all the numbers together, and all the variables
-(+7.5x)+3=0
We get rid of parentheses
-7.5x+3=0
We move all terms containing x to the left, all other terms to the right
-7.5x=-3
x=-3/-7.5
x=3/7.5
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