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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. 9 10 11 12
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OpenStudy (anonymous):
12
OpenStudy (zzr0ck3r):
a = birds b = butterflys a+b=19 2a+4b=52 so a=19-b 2(a)+4b=52 2(19-b)+4b=52 38-2b+4b=52 2b=14 b=7 so a = 12
OpenStudy (anonymous):
Thanks
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