2a+7=9a-7

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



2a+7=9a-7

We move all terms to the left:

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

We get rid of parentheses

2a-9a+7+7=0

We add all the numbers together, and all the variables

-7a+14=0

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

-7a=-14

a=-14/-7

a=+2

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