Problema Solution
at recent visist to the reptile house at the local zoo, I counted a total of 27 heads and 70 feet. I was counting snakes, lizards and people and i knoe that there were exactly twice as many lizards as people. How many snakes did i count?
Answer provided by our tutors
Let
x = the number of snakes
y = the number of lizards
z = the number of people
x + y + z = 27
y = 2z
4y + 2z = 70
........
click here to see the system of equations solved for x, y and z
........
x = 6 snakes
y = 14 lizards
z = 7 people
There were 6 snakes counted.