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-4+4x=x-9
We move all terms to the left:
-4+4x-(x-9)=0
We get rid of parentheses
4x-x+9-4=0
We add all the numbers together, and all the variables
3x+5=0
We move all terms containing x to the left, all other terms to the right
3x=-5
x=-5/3
x=-1+2/3
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