SOLUTION: A sightseeing boat charges $5 for children and $8 for adults. On it's first trip of the day it collected $439 for 71 paying passengers. How many children and how many adults were t

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Question 158377: A sightseeing boat charges $5 for children and $8 for adults. On it's first trip of the day it collected $439 for 71 paying passengers. How many children and how many adults were there?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
8A+5C=439
A+C=71 OR A=71-C
8(71-C)+5C=439
568-8C+5C=439
-3C=439-568
-3C=-129
C=-129/-3
C=43 CHILDREN TICKETS SOLD.
A+43=71
A=71-43
A=28 ADULT TICKETS SOLD.
PROOF:
8*28+5*43=439
224+215=439
439=439