40=7+x+2

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Solution for 40=7+x+2 equation: 



40=7+x+2

We move all terms to the left:

40-(7+x+2)=0

We add all the numbers together, and all the variables

-(x+9)+40=0

We get rid of parentheses

-x-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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