40+x=9+2x

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Solution for 40+x=9+2x equation: 



40+x=9+2x

We move all terms to the left:

40+x-(9+2x)=0

We add all the numbers together, and all the variables

x-(2x+9)+40=0

We get rid of parentheses

x-2x-9+40=0

We add all the numbers together, and all the variables

-1x+31=0

We move all terms containing x to the left, all other terms to the right

-x=-31

x=-31/-1

x=+31

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