13a+7+a=49

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Solution for 13a+7+a=49 equation: 



13a+7+a=49

We move all terms to the left:

13a+7+a-(49)=0

We add all the numbers together, and all the variables

14a-42=0

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

14a=42

a=42/14

a=3

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