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-9x+8=4x-42
We move all terms to the left:
-9x+8-(4x-42)=0
We get rid of parentheses
-9x-4x+42+8=0
We add all the numbers together, and all the variables
-13x+50=0
We move all terms containing x to the left, all other terms to the right
-13x=-50
x=-50/-13
x=3+11/13
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