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