40=2x+7x+4

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Solution for 40=2x+7x+4 equation: 



40=2x+7x+4

We move all terms to the left:

40-(2x+7x+4)=0

We add all the numbers together, and all the variables

-(9x+4)+40=0

We get rid of parentheses

-9x-4+40=0

We add all the numbers together, and all the variables

-9x+36=0

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

-9x=-36

x=-36/-9

x=+4

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