8-a=a-9

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Solution for 8-a=a-9 equation: 



8-a=a-9

We move all terms to the left:

8-a-(a-9)=0

We add all the numbers together, and all the variables

-1a-(a-9)+8=0

We get rid of parentheses

-1a-a+9+8=0

We add all the numbers together, and all the variables

-2a+17=0

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

-2a=-17

a=-17/-2

a=8+1/2

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