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12=6x+18-8x
We move all terms to the left:
12-(6x+18-8x)=0
We add all the numbers together, and all the variables
-(-2x+18)+12=0
We get rid of parentheses
2x-18+12=0
We add all the numbers together, and all the variables
2x-6=0
We move all terms containing x to the left, all other terms to the right
2x=6
x=6/2
x=3
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