2a-5=9+7

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Solution for 2a-5=9+7 equation: 



2a-5=9+7

We move all terms to the left:

2a-5-(9+7)=0

We add all the numbers together, and all the variables

2a-5-16=0

We add all the numbers together, and all the variables

2a-21=0

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

2a=21

a=21/2

a=10+1/2

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