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(4x-40)=x
We move all terms to the left:
(4x-40)-(x)=0
We add all the numbers together, and all the variables
-1x+(4x-40)=0
We get rid of parentheses
-1x+4x-40=0
We add all the numbers together, and all the variables
3x-40=0
We move all terms containing x to the left, all other terms to the right
3x=40
x=40/3
x=13+1/3
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