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17 March, 23:01

Find all real numbers X such that 4x+2>14 AND - 21x+1>22

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  1. 18 March, 00:42
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    What you must do for this case is to solve both inequalities

    We have then:

    4x + 2> 14

    We clear x:

    4x + 2> 14

    x> (14-2) / 4

    x> 3

    -21x + 1> 22

    We clear x:

    -21x> 22-1

    x <-21/21

    x <-1

    Therefore we have to

    For 4x + 2> 14

    x belongs (3, inf)

    For - 21x + 1> 22

    x belongs (-inf, - 1)

    The solution that is met for both inequalities is:

    x belongs (-inf, - 1) U (3, inf)
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