2a+7a=25

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Solution for 2a+7a=25 equation: 



2a+7a=25

We move all terms to the left:

2a+7a-(25)=0

We add all the numbers together, and all the variables

9a-25=0

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

9a=25

a=25/9

a=2+7/9

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