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84+13.5x=22.5x
We move all terms to the left:
84+13.5x-(22.5x)=0
We add all the numbers together, and all the variables
13.5x-(+22.5x)+84=0
We get rid of parentheses
13.5x-22.5x+84=0
We add all the numbers together, and all the variables
-9x+84=0
We move all terms containing x to the left, all other terms to the right
-9x=-84
x=-84/-9
x=9+1/3
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