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-4=x/13
We move all terms to the left:
-4-(x/13)=0
We add all the numbers together, and all the variables
-(+x/13)-4=0
We get rid of parentheses
-x/13-4=0
We multiply all the terms by the denominator
-x-4*13=0
We add all the numbers together, and all the variables
-1x-52=0
We move all terms containing x to the left, all other terms to the right
-x=52
x=52/-1
x=-52
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