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-83-4x=-120+85
We move all terms to the left:
-83-4x-(-120+85)=0
We add all the numbers together, and all the variables
-4x-83-(-35)=0
We add all the numbers together, and all the variables
-4x-48=0
We move all terms containing x to the left, all other terms to the right
-4x=48
x=48/-4
x=-12
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