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23 May, 15:08

21 is greater than or equal to 3 (a-7) + 9

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  1. 23 May, 16:06
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    21≥ 3 (a-7) + 9

    first, just solve it like a normal equation

    Distribute

    21 ≥3a-21+9

    Combine numbers

    21 ≥3a-12

    Solve like equation

    33 ≥3a

    11≥a

    "a" has to be less than or equal to 11 for the inequality to be true
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