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16 March, 18:35

Solve: - 4 < - 2x < 10

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  1. 16 March, 20:20
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    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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