-5x-9=12-8x

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Solution for -5x-9=12-8x equation: 



-5x-9=12-8x

We move all terms to the left:

-5x-9-(12-8x)=0

We add all the numbers together, and all the variables

-5x-(-8x+12)-9=0

We get rid of parentheses

-5x+8x-12-9=0

We add all the numbers together, and all the variables

3x-21=0

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

3x=21

x=21/3

x=7

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