SOLUTION: I'm having some trouble with this interval. I came up with the answer: (-INFINITY,-8) but it comes up that -INFINITY is incorrect. Can you help me? -3x+16<-6x-8 thanks!

Question 196828: I'm having some trouble with this interval. I came up with the answer: (-INFINITY,-8) but it comes up that -INFINITY is incorrect. Can you help me?
-3x+16<-6x-8
thanks!
Found 2 solutions by Mathtut, jim_thompson5910:
Answer by Mathtut(3670) (Show Source): You can put this solution on YOUR website!
-3x+16<-6x-8
:
3x<-24......added 6x and subtracted 16 from both sides
:
x<-8
:
you are correct.....if answer book doesnt say - infinity...ITS wrong
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given inequality.

Subtract from both sides.

Add to both sides.

Combine like terms on the left side.

Combine like terms on the right side.

Divide both sides by to isolate .

Reduce.

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Answer:

So the answer is

So the answer in interval notation is

So you are correct.

So either they want you to enter the answer in differently (maybe they want "-inf" instead of "-infinity"??) or they have the wrong answer.

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