6th Grade Functions Word Problems: Problem 4

Problem: Out of the four people A, B, C, and D, any time you select 3 people, find their age average, and then add it to the age of the remaining person, you get the sums 29, 23, 21, and 17. What is the difference of the age of the oldest person and the age of the youngest person?

Key: Create equations out of descripts given in problem, eliminate as much variables as possible

Please consider subscribing, here's our website: https://inquisitivekids.github.io