12-15x=8x-9

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Solution for 12-15x=8x-9 equation: 



12-15x=8x-9

We move all terms to the left:

12-15x-(8x-9)=0

We get rid of parentheses

-15x-8x+9+12=0

We add all the numbers together, and all the variables

-23x+21=0

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

-23x=-21

x=-21/-23

x=21/23

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