-1+9a=20+6a

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Solution for -1+9a=20+6a equation: 



-1+9a=20+6a

We move all terms to the left:

-1+9a-(20+6a)=0

We add all the numbers together, and all the variables

9a-(6a+20)-1=0

We get rid of parentheses

9a-6a-20-1=0

We add all the numbers together, and all the variables

3a-21=0

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

3a=21

a=21/3

a=7

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