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X=13-4X
We move all terms to the left:
X-(13-4X)=0
We add all the numbers together, and all the variables
X-(-4X+13)=0
We get rid of parentheses
X+4X-13=0
We add all the numbers together, and all the variables
5X-13=0
We move all terms containing X to the left, all other terms to the right
5X=13
X=13/5
X=2+3/5
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