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26 September, 06:57

If p + q = 36, and p - q = 20, then q = ?

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  1. 26 September, 07:25
    0
    q = 8

    Step-by-step explanation:

    Given the 2 equations

    p + q = 36 → (1)

    p - q = 20 → (2)

    Add the 2 equations term by term

    2p = 56 (divide both sides by 2)

    p = 28

    Substitute p = 28 into (1)

    28 + q = 36 (subtract 28 from both sides)

    q = 8
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