13a+15=4a

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Solution for 13a+15=4a equation: 



13a+15=4a

We move all terms to the left:

13a+15-(4a)=0

We add all the numbers together, and all the variables

9a+15=0

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

9a=-15

a=-15/9

a=-1+2/3

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