21-8a=-1+6(4-5a)

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Solution for 21-8a=-1+6(4-5a) equation: 



21-8a=-1+6(4-5a)

We move all terms to the left:

21-8a-(-1+6(4-5a))=0

We add all the numbers together, and all the variables

-8a-(-1+6(-5a+4))+21=0



We calculate terms in parentheses: -(-1+6(-5a+4)), so:

-1+6(-5a+4)

determiningTheFunctionDomain
6(-5a+4)-1

We multiply parentheses

-30a+24-1

We add all the numbers together, and all the variables

-30a+23

Back to the equation:

-(-30a+23)



We get rid of parentheses

-8a+30a-23+21=0

We add all the numbers together, and all the variables

22a-2=0

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

22a=2

a=2/22

a=1/11

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