3+21=9+5x

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Solution for 3+21=9+5x equation: 



3+21=9+5x

We move all terms to the left:

3+21-(9+5x)=0

We add all the numbers together, and all the variables

-(5x+9)+3+21=0

We add all the numbers together, and all the variables

-(5x+9)+24=0

We get rid of parentheses

-5x-9+24=0

We add all the numbers together, and all the variables

-5x+15=0

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

-5x=-15

x=-15/-5

x=+3

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