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(x/3)-3=12
We move all terms to the left:
(x/3)-3-(12)=0
We add all the numbers together, and all the variables
(+x/3)-3-12=0
We add all the numbers together, and all the variables
(+x/3)-15=0
We get rid of parentheses
x/3-15=0
We multiply all the terms by the denominator
x-15*3=0
We add all the numbers together, and all the variables
x-45=0
We move all terms containing x to the left, all other terms to the right
x=45
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