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4x-9x+8=5x+40
We move all terms to the left:
4x-9x+8-(5x+40)=0
We add all the numbers together, and all the variables
-5x-(5x+40)+8=0
We get rid of parentheses
-5x-5x-40+8=0
We add all the numbers together, and all the variables
-10x-32=0
We move all terms containing x to the left, all other terms to the right
-10x=32
x=32/-10
x=-3+1/5
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