3(-9a+-21)+11=8(a+-1)-9

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Solution for 3(-9a+-21)+11=8(a+-1)-9 equation: 



3(-9a+-21)+11=8(a+-1)-9

We move all terms to the left:

3(-9a+-21)+11-(8(a+-1)-9)=0

We add all the numbers together, and all the variables

3(-9a-21)-(8(a-1)-9)+11=0

We multiply parentheses

-27a-(8(a-1)-9)-63+11=0



We calculate terms in parentheses: -(8(a-1)-9), so:

8(a-1)-9

We multiply parentheses

8a-8-9

We add all the numbers together, and all the variables

8a-17

Back to the equation:

-(8a-17)



We add all the numbers together, and all the variables

-27a-(8a-17)-52=0

We get rid of parentheses

-27a-8a+17-52=0

We add all the numbers together, and all the variables

-35a-35=0

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

-35a=35

a=35/-35

a=-1

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