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-9x+5=x-75
We move all terms to the left:
-9x+5-(x-75)=0
We get rid of parentheses
-9x-x+75+5=0
We add all the numbers together, and all the variables
-10x+80=0
We move all terms containing x to the left, all other terms to the right
-10x=-80
x=-80/-10
x=+8
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