15x=-6x-9

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



15x=-6x-9

We move all terms to the left:

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

We get rid of parentheses

15x+6x+9=0

We add all the numbers together, and all the variables

21x+9=0

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

21x=-9

x=-9/21

x=-3/7

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