7a+18=39

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Solution for 7a+18=39 equation: 



7a+18=39

We move all terms to the left:

7a+18-(39)=0

We add all the numbers together, and all the variables

7a-21=0

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

7a=21

a=21/7

a=3

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