15-4a=-8a+9

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Solution for 15-4a=-8a+9 equation: 



15-4a=-8a+9

We move all terms to the left:

15-4a-(-8a+9)=0

We get rid of parentheses

-4a+8a-9+15=0

We add all the numbers together, and all the variables

4a+6=0

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

4a=-6

a=-6/4

a=-1+1/2

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