9+4a=13

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Solution for 9+4a=13 equation: 



9+4a=13

We move all terms to the left:

9+4a-(13)=0

We add all the numbers together, and all the variables

4a-4=0

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

4a=4

a=4/4

a=1

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