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-140=13x-10
We move all terms to the left:
-140-(13x-10)=0
We get rid of parentheses
-13x+10-140=0
We add all the numbers together, and all the variables
-13x-130=0
We move all terms containing x to the left, all other terms to the right
-13x=130
x=130/-13
x=-10
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