24=-3(3a-15)-a

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Solution for 24=-3(3a-15)-a equation: 



24=-3(3a-15)-a

We move all terms to the left:

24-(-3(3a-15)-a)=0



We calculate terms in parentheses: -(-3(3a-15)-a), so:

-3(3a-15)-a

We add all the numbers together, and all the variables

-1a-3(3a-15)

We multiply parentheses

-1a-9a+45

We add all the numbers together, and all the variables

-10a+45

Back to the equation:

-(-10a+45)



We get rid of parentheses

10a-45+24=0

We add all the numbers together, and all the variables

10a-21=0

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

10a=21

a=21/10

a=2+1/10

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