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4-7x=6x-8x-9
We move all terms to the left:
4-7x-(6x-8x-9)=0
We add all the numbers together, and all the variables
-7x-(-2x-9)+4=0
We get rid of parentheses
-7x+2x+9+4=0
We add all the numbers together, and all the variables
-5x+13=0
We move all terms containing x to the left, all other terms to the right
-5x=-13
x=-13/-5
x=2+3/5
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