Mathematics, 22.07.2021 14:00 kpgmfb

there are unspecified number of cows and hens in a den. if there are total of 30 heads and 80 legs in a den, find the number of cows and hens in a den.

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there are unspecified number of cows and hens in a den. if there are total of 30 heads and 80 legs i...