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X+6=7X-30
We move all terms to the left:
X+6-(7X-30)=0
We get rid of parentheses
X-7X+30+6=0
We add all the numbers together, and all the variables
-6X+36=0
We move all terms containing X to the left, all other terms to the right
-6X=-36
X=-36/-6
X=+6
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