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X=80X-3
We move all terms to the left:
X-(80X-3)=0
We get rid of parentheses
X-80X+3=0
We add all the numbers together, and all the variables
-79X+3=0
We move all terms containing X to the left, all other terms to the right
-79X=-3
X=-3/-79
X=3/79
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