7+9a=25

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Solution for 7+9a=25 equation: 



7+9a=25

We move all terms to the left:

7+9a-(25)=0

We add all the numbers together, and all the variables

9a-18=0

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

9a=18

a=18/9

a=2

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