13=a/9-3

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Solution for 13=a/9-3 equation: 



13=a/9-3

We move all terms to the left:

13-(a/9-3)=0

We get rid of parentheses

-a/9+3+13=0

We multiply all the terms by the denominator


-a+3*9+13*9=0

We add all the numbers together, and all the variables

-1a+144=0

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

-a=-144

a=-144/-1

a=+144

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