Problema Solution
20 children go for a picnic in a bus. They are to sit 2 or 3 to a seat. There are 7 seats. How many seats will have 3 children seated on them?
Answer provided by our tutors
Let
x = the number of seats that have 2 children
y = the number of seats that have 3 children
There are 7 seats:
x + y = 7
20 children go for a picnic in a bus:
2x + 3y = 20
We have the following system of equations:
x + y = 7
2x + 3y = 20
........
click here to see the system of equations solved for x and y
........
x = 1
y = 6
6 seats will have 3 children seated on them.