-9(2a+5)=21+4a

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Solution for -9(2a+5)=21+4a equation: 



-9(2a+5)=21+4a

We move all terms to the left:

-9(2a+5)-(21+4a)=0

We add all the numbers together, and all the variables

-9(2a+5)-(4a+21)=0

We multiply parentheses

-18a-(4a+21)-45=0

We get rid of parentheses

-18a-4a-21-45=0

We add all the numbers together, and all the variables

-22a-66=0

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

-22a=66

a=66/-22

a=-3

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