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3.5x+12.75=5x-11.25
We move all terms to the left:
3.5x+12.75-(5x-11.25)=0
We get rid of parentheses
3.5x-5x+11.25+12.75=0
We add all the numbers together, and all the variables
-1.5x+24=0
We move all terms containing x to the left, all other terms to the right
-1.5x=-24
x=-24/-1.5
x=+16
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