21-(x+8)=9x-7

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Solution for 21-(x+8)=9x-7 equation: 



21-(x+8)=9x-7

We move all terms to the left:

21-(x+8)-(9x-7)=0

We get rid of parentheses

-x-9x-8+7+21=0

We add all the numbers together, and all the variables

-10x+20=0

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

-10x=-20

x=-20/-10

x=+2

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