Boats 2

Three quarters of the boats in the marina are white 4/7 of the remaining boats are blue, rest are red if there are 9 red boats. How many boats are in the marina?

Correct answer:

n =  84

Step-by-step explanation:

3/4 n+4/7 (n3/4 n)+9=n  3n=252  n=84=84

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