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OpenStudy (anonymous):
During a hike, Vijay saw a total of 19 birds and butterflies. Knowing that birds have 2 wings and butterflies have 4 wings, he counted 52 wings. Use a model to determine how many birds he saw.
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Parth (parthkohli):
Hmm, we can say something like this:\[x + y = 19\\2x + 4y = 52 \]
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