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18=6x-13
We move all terms to the left:
18-(6x-13)=0
We get rid of parentheses
-6x+13+18=0
We add all the numbers together, and all the variables
-6x+31=0
We move all terms containing x to the left, all other terms to the right
-6x=-31
x=-31/-6
x=5+1/6
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