a+8=2a-9

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Solution for a+8=2a-9 equation: 



a+8=2a-9

We move all terms to the left:

a+8-(2a-9)=0

We get rid of parentheses

a-2a+9+8=0

We add all the numbers together, and all the variables

-1a+17=0

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

-a=-17

a=-17/-1

a=+17

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