13=4*a

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Solution for 13=4*a equation: 



13=4*a

We move all terms to the left:

13-(4*a)=0

We add all the numbers together, and all the variables

-(+4a)+13=0

We get rid of parentheses

-4a+13=0

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

-4a=-13

a=-13/-4

a=3+1/4

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