asked 35.5k views
5 votes
What numbers are 3 units away from -1 on a number line?

asked
User Golay
by
7.5k points

1 Answer

6 votes

Answer: 2 and -4

Explanation:

tiffanyrenaew21 is not completely right. The correct answer would be 2 and -4. This is how you find your answer:

First you form an equation: |x-(-1)|=3

|x+1|=3 - - - - - - - - |x+1|=-3

Subtract 1 from both sides

x=2 - - - - - - - - - - x=-4

You will always have 2 answers as absolute value equations and inequalities can always be positive or negative. |positive or negative| = positive.

If |x|=-n, then there are no solutions, becuase absolute value can't be negative.

answered
User Anil Verma
by
9.0k points

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