5a+9=8a-9

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Solution for 5a+9=8a-9 equation: 



5a+9=8a-9

We move all terms to the left:

5a+9-(8a-9)=0

We get rid of parentheses

5a-8a+9+9=0

We add all the numbers together, and all the variables

-3a+18=0

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

-3a=-18

a=-18/-3

a=+6

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