-21-8a=6(4-5a)

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Solution for -21-8a=6(4-5a) equation: 



-21-8a=6(4-5a)

We move all terms to the left:

-21-8a-(6(4-5a))=0

We add all the numbers together, and all the variables

-8a-(6(-5a+4))-21=0



We calculate terms in parentheses: -(6(-5a+4)), so:

6(-5a+4)

We multiply parentheses

-30a+24

Back to the equation:

-(-30a+24)



We get rid of parentheses

-8a+30a-24-21=0

We add all the numbers together, and all the variables

22a-45=0

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

22a=45

a=45/22

a=2+1/22

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