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43x-4x=9x-50
We move all terms to the left:
43x-4x-(9x-50)=0
We add all the numbers together, and all the variables
39x-(9x-50)=0
We get rid of parentheses
39x-9x+50=0
We add all the numbers together, and all the variables
30x+50=0
We move all terms containing x to the left, all other terms to the right
30x=-50
x=-50/30
x=-1+2/3
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