-3x-x+9=15

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



-3x-x+9=15

We move all terms to the left:

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

We add all the numbers together, and all the variables

-4x-6=0

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

-4x=6

x=6/-4

x=-1+1/2

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