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Mathematics, 03.10.2021 20:20 tatumleigh04

Find the weights of Maryellen, her brother, and her pet from the following clues: Maryellen, her brother, and her pet altogether
weigh 155 lb; the weight of her brother and her pet together,
subtracted from Maryellen's weight, is 37 lb; Maryellen and her
pet together weigh 1l2lb.

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