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-5x-8=-x-20
We move all terms to the left:
-5x-8-(-x-20)=0
We add all the numbers together, and all the variables
-5x-(-1x-20)-8=0
We get rid of parentheses
-5x+1x+20-8=0
We add all the numbers together, and all the variables
-4x+12=0
We move all terms containing x to the left, all other terms to the right
-4x=-12
x=-12/-4
x=+3
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