2a+9-7=9

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



2a+9-7=9

We move all terms to the left:

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

We add all the numbers together, and all the variables

2a-7=0

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

2a=7

a=7/2

a=3+1/2

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