9-15x=-6x+21

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Solution for 9-15x=-6x+21 equation: 



9-15x=-6x+21

We move all terms to the left:

9-15x-(-6x+21)=0

We get rid of parentheses

-15x+6x-21+9=0

We add all the numbers together, and all the variables

-9x-12=0

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

-9x=12

x=12/-9

x=-1+1/3

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