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3=x/3-9
We move all terms to the left:
3-(x/3-9)=0
We get rid of parentheses
-x/3+9+3=0
We multiply all the terms by the denominator
-x+9*3+3*3=0
We add all the numbers together, and all the variables
-1x+36=0
We move all terms containing x to the left, all other terms to the right
-x=-36
x=-36/-1
x=+36
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