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18=2x+10+6x-12
We move all terms to the left:
18-(2x+10+6x-12)=0
We add all the numbers together, and all the variables
-(8x-2)+18=0
We get rid of parentheses
-8x+2+18=0
We add all the numbers together, and all the variables
-8x+20=0
We move all terms containing x to the left, all other terms to the right
-8x=-20
x=-20/-8
x=2+1/2
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