Problema Solution
If you add Natalie's age and Fred's age, the result is 39. If you add Fred's age to 3 times Natalie's age, the result is 69. Write and solve a system of equations to find how old Fred and Natalie are.
Answer provided by our tutors
let
n = Natalie's age
f = Fred's age
If you add Natalie's age and Fred's age, the result is 39:
n + f = 39
If you add Fred's age to 3 times Natalie's age, the result is 69:
f + 3n = 69
by solving the system of equations:
n + f = 39
f + 3n = 69
we find:
f = 24 years
n = 15 years
click here to see the step by step solution of the system of equations:
Fred is 24 years old.
Natalie is 15 years old.