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40=12x+12
We move all terms to the left:
40-(12x+12)=0
We get rid of parentheses
-12x-12+40=0
We add all the numbers together, and all the variables
-12x+28=0
We move all terms containing x to the left, all other terms to the right
-12x=-28
x=-28/-12
x=2+1/3
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