40=3x-x

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Solution for 40=3x-x equation:



40=3x-x
We move all terms to the left:
40-(3x-x)=0
We add all the numbers together, and all the variables
-(+2x)+40=0
We get rid of parentheses
-2x+40=0
We move all terms containing x to the left, all other terms to the right
-2x=-40
x=-40/-2
x=+20

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