Problema Solution
The big Screamer coaster carries 92 people altogether. some of its cars carry 4 passengers. there are three less 6-passenger cars than4-passenger cars. how many 4-passenger cars are there
Answer provided by our tutors
X = 4passenger cars
X - 3 = 6passenger cars
4*X = people in 4 passenger cars
6*(X-3) = people in 6 passenger cars
92 = total people so
(4*X) + 6*(X-3) = 92
4x + 6X - 18 = 92
10X - 18 = 92
10X - 18 + 18 = 92 + 18
10X = 110
X = 11 = number of 4 passenger cars
11 - 3 = 8 = cars that hold 6 passengers
check
4*11 + 6*8 = 44 + 48 = 92