7a-9=7a+9

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



7a-9=7a+9

We move all terms to the left:

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

We get rid of parentheses

7a-7a-9-9=0

We add all the numbers together, and all the variables

-18!=0

There is no solution for this equation

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