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3.5x+225=12.25+15x
We move all terms to the left:
3.5x+225-(12.25+15x)=0
We add all the numbers together, and all the variables
3.5x-(15x+12.25)+225=0
We get rid of parentheses
3.5x-15x-12.25+225=0
We add all the numbers together, and all the variables
-11.5x+212.75=0
We move all terms containing x to the left, all other terms to the right
-11.5x=-212.75
x=-212.75/-11.5
x=18+3.28571428571/6.57142857143
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