x-9=-3x=15

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



x-9=-3x=15

We move all terms to the left:

x-9-(-3x)=0

We get rid of parentheses

x+3x-9=0

We add all the numbers together, and all the variables

4x-9=0

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

4x=9

x=9/4

x=2+1/4

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