21=2x-7+9x

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Solution for 21=2x-7+9x equation: 



21=2x-7+9x

We move all terms to the left:

21-(2x-7+9x)=0

We add all the numbers together, and all the variables

-(11x-7)+21=0

We get rid of parentheses

-11x+7+21=0

We add all the numbers together, and all the variables

-11x+28=0

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

-11x=-28

x=-28/-11

x=2+6/11

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