1a-13=3+9a

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Solution for 1a-13=3+9a equation: 



1a-13=3+9a

We move all terms to the left:

1a-13-(3+9a)=0

We add all the numbers together, and all the variables

1a-(9a+3)-13=0

We add all the numbers together, and all the variables

a-(9a+3)-13=0

We get rid of parentheses

a-9a-3-13=0

We add all the numbers together, and all the variables

-8a-16=0

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

-8a=16

a=16/-8

a=-2

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