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(5x-6)-3=12
We move all terms to the left:
(5x-6)-3-(12)=0
We add all the numbers together, and all the variables
(5x-6)-15=0
We get rid of parentheses
5x-6-15=0
We add all the numbers together, and all the variables
5x-21=0
We move all terms containing x to the left, all other terms to the right
5x=21
x=21/5
x=4+1/5
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