9x-21=4(x+6)

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Solution for 9x-21=4(x+6) equation: 



9x-21=4(x+6)

We move all terms to the left:

9x-21-(4(x+6))=0



We calculate terms in parentheses: -(4(x+6)), so:

4(x+6)

We multiply parentheses

4x+24

Back to the equation:

-(4x+24)



We get rid of parentheses

9x-4x-24-21=0

We add all the numbers together, and all the variables

5x-45=0

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

5x=45

x=45/5

x=9

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