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16 September, 02:59

Mork and Mindy went to the garden center together to buy plants. Mork bought 6 ferns and 1 azalea for $80. Mindy bought 5 ferns and 3 azaleas for $84. What is the price of a single fern?

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  1. 16 September, 05:07
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    Convert the info into equations:

    6f + a = 80

    5f + 3a = 84

    Then substitute one into the other, such that you eliminate one variable:

    6f + a = 80 = > a = 80-6f

    5f + 3 (80-6f) = 84 = > 5f + 240 - 18f = 84 = > - 13f = - 156 = > f=12

    so the fern is $12.
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