-x-9=3x+7

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Solution for -x-9=3x+7 equation: 



-x-9=3x+7

We move all terms to the left:

-x-9-(3x+7)=0

We add all the numbers together, and all the variables

-1x-(3x+7)-9=0

We get rid of parentheses

-1x-3x-7-9=0

We add all the numbers together, and all the variables

-4x-16=0

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

-4x=16

x=16/-4

x=-4

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