15x+9=9x-3

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Solution for 15x+9=9x-3 equation: 



15x+9=9x-3

We move all terms to the left:

15x+9-(9x-3)=0

We get rid of parentheses

15x-9x+3+9=0

We add all the numbers together, and all the variables

6x+12=0

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

6x=-12

x=-12/6

x=-2

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