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-8=18+13x
We move all terms to the left:
-8-(18+13x)=0
We add all the numbers together, and all the variables
-(13x+18)-8=0
We get rid of parentheses
-13x-18-8=0
We add all the numbers together, and all the variables
-13x-26=0
We move all terms containing x to the left, all other terms to the right
-13x=26
x=26/-13
x=-2
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