Problema Solution
A group of 27 people went on a trip across a lake. Twelve people went in motorboat, and the rest traveled by canoe (3 in each canoe). On the return trip, 4 people rode in each canoe. How many returned in the motorboat?
Answer provided by our tutors
let n = the number of canoes
12 people went in motorboat, and the rest traveled by canoe (3 in each canoe). the total number of people is 27
12 + 3n = 27
by solving we find that the number of canoes is
n = 5 canoes
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On the return trip, 4 people rode in each canoe thus
total for 4*5 = 20 people traveled by canoes
the rest of the people wen with motorboat: 27 - 20 = 7
on the return trip 7 people returned in the motorboat.