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56=20+12x
We move all terms to the left:
56-(20+12x)=0
We add all the numbers together, and all the variables
-(12x+20)+56=0
We get rid of parentheses
-12x-20+56=0
We add all the numbers together, and all the variables
-12x+36=0
We move all terms containing x to the left, all other terms to the right
-12x=-36
x=-36/-12
x=+3
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