Meadow bird distribution

The meadow has massive trees, a lake, and tall grass. A seventh of the birds sit in nests in trees. A third swim in the lake and a quarter of the birds sit in nests in the tall grass. Twenty-three birds are sitting on tree branches. How many birds are there in total in the meadow? How many swim in the lake?

Final Answer:

n =  84
j =  28

Step-by-step explanation:

7n+3n+4n+23=n  n/7+n/3+n/4+23=n  23n=1932  n=231932=84  n=84
j=n/3=84/3=28



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