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Answer:
Step-by-step explanation:
You have a total of 114 legs among hippos and birds, of which there are a total of 42. You want the number of each kind of animal.
Let h represent the number of hippos. Then 42-h is the number of birds, and the total number of legs is ...
4h +2(42 -h) = 114
Simplifying the equation gives ...
2h +84 = 114
2h = 30 . . . . . . subtract 84
h = 15 . . . . . . . . number of hippos
42 -h = 27 . . . . number of birds
There were 15 hippos and 27 birds.