10a-9=8a+15

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Solution for 10a-9=8a+15 equation: 



10a-9=8a+15

We move all terms to the left:

10a-9-(8a+15)=0

We get rid of parentheses

10a-8a-15-9=0

We add all the numbers together, and all the variables

2a-24=0

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

2a=24

a=24/2

a=12

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