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X+2=13.X=11
We move all terms to the left:
X+2-(13.X)=0
We add all the numbers together, and all the variables
X-(+13.X)+2=0
We get rid of parentheses
X-13.X+2=0
We add all the numbers together, and all the variables
-12X+2=0
We move all terms containing X to the left, all other terms to the right
-12X=-2
X=-2/-12
X=1/6
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