A farm sold three sheep. the weight of the three sheep combine wae 152 lbs. The smallest sheep weighted 7 lbs less than the middle size sheep. The largest sheep weighted three times the smallest sheep. what is the weight of each sheep?


I would start with a list.

Sheep sizeWeight
small size?
middle size? + 7
large size? + ? + ?
Total5? + 7

Usually we use x for the unknown, not ?, so what we have is 5x + 7 = 152 Thus 5x = 145 and hence x = 29 pounds.

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