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4x-13=8x+9
We move all terms to the left:
4x-13-(8x+9)=0
We get rid of parentheses
4x-8x-9-13=0
We add all the numbers together, and all the variables
-4x-22=0
We move all terms containing x to the left, all other terms to the right
-4x=22
x=22/-4
x=-5+1/2
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