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X-8-3X=12-12X
We move all terms to the left:
X-8-3X-(12-12X)=0
We add all the numbers together, and all the variables
X-3X-(-12X+12)-8=0
We add all the numbers together, and all the variables
-2X-(-12X+12)-8=0
We get rid of parentheses
-2X+12X-12-8=0
We add all the numbers together, and all the variables
10X-20=0
We move all terms containing X to the left, all other terms to the right
10X=20
X=20/10
X=2
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