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3 April, 12:48

The cost of 3 markers and 2 pencils is $1.80. The cost of 4 markers and 6 pencils is $2.90 What is the cost of each item?

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  1. 3 April, 12:57
    0
    3m + 2p = 1.8 ⇒ 9m + 6p = 5.4

    4m + 6p = 2.9 ⇒ 4m + 6p = 2.9

    5m = 2.5

    5 5

    m = 0.5

    3m + 2p = 1.8

    3 (0.5) + 2p = 1.8

    1.5 + 2p = 1.8

    - 1.5 - 1.5

    2p = 0.3

    2 2

    p = 0.15

    (m, p) = (0.3, 0.15)
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