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13 May, 19:18

An animal shelter spends $4.50 per day to care for each bird and $8.50 per day to care for each cat. Joshua noticed that the shelter spent $173.50 caring for birds and cats on Tuesday. Joshua found a record showing that there were a total of 27 birds and cats on Tuesday. How many birds were at the shelter on Tuesday?

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  1. 13 May, 19:42
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    76 birds

    Step-by-step explanation:

    Let x = the number of birds

    Let y = the number of cats

    x + y = 35 y = 35 - x

    4.50x + 8.50y = 221.50 Multiply the whole equation by 100.

    450x + 850y = 22150

    450x + 850 (35 - x) = 22150

    450x + 29750 - 850x = 22150

    -100x = - 7600

    x = 76 birds
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