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17 October, 21:17

Lianne charged twice as much to walk a large dog than she did to walk a small dog. This week she had time to was 10 small dogs and 5 large dogs, and she wants to make $100. How much should she charge per small dog? Per large dog?

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  1. 17 October, 21:44
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    Well she charged twice as much to walk large then small. Let s be small and l be large.

    We we know that

    l = 2s

    we also know that she wants to make 100 so

    xl + ys = 100

    Where where x is number of large and y is number of small. it says she walked 10 small and 5 large so

    5l + 10s = 100

    substitute 2s for l because they are same value as shown in first equation I made

    5 (2s) + 10s = 100

    10s + 10s = 100

    20s = 100

    s = 5

    we can now solve for l

    l = 2s

    l = 2 * 5

    l = 10

    So s is 5 and l is 10.
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