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X+209=8X+6
We move all terms to the left:
X+209-(8X+6)=0
We get rid of parentheses
X-8X-6+209=0
We add all the numbers together, and all the variables
-7X+203=0
We move all terms containing X to the left, all other terms to the right
-7X=-203
X=-203/-7
X=+29
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