andrianadenise andrianadenise
  • 04-07-2020
  • Mathematics
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Solve: -4 < -2x < 10

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jimthompson5910 jimthompson5910
  • 04-07-2020

Answer:   -5 < x < 2

Explanation:

The expression -2x means -2 times x. To undo this, we divide all parts of the inequality by -2. Dividing by a negative number will flip the inequality sign. We go from "less than" to "greater than"

-4 < -2x < 10

-4/(-2) > x > 10/(-2) .... inequality signs flip

2 > x > -5

-5 < x < 2

This unknown number x is between -5 and 2. It cannot equal -5. It cannot equal 2.

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