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4 January, 08:59

If 4x-2y>3 and 2x-2y<18, which must be true?

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  1. 4 January, 11:36
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    Let's say 2y < 18 - 2x

    so

    4x - 2y > 3

    4x - 18 - 2x > 3

    2x > 21

    2x/2 > 21/2

    x > 10.5

    2y < 18 - 2 (10.5)

    2y < 18 - 21

    2y < - 3

    y < 1.5
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