-1x-15=3x+9

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Solution for -1x-15=3x+9 equation: 



-1x-15=3x+9

We move all terms to the left:

-1x-15-(3x+9)=0

We get rid of parentheses

-1x-3x-9-15=0

We add all the numbers together, and all the variables

-4x-24=0

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

-4x=24

x=24/-4

x=-6

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