SOLUTION: Harry is one third as old as Ron and 8 years younger than Hermione. If Harry is 8 years old, what is the sum of their ages? Find the answers using a.)Cramer`s rule and b.) Gauss

Question 1118004: Harry is one third as old as Ron and 8 years younger than Hermione. If Harry is 8 years old, what is the sum of their ages?
Find the answers using a.)Cramer`s rule and b.) Gaussian Elimination Method.
Answer by josgarithmetic(39630) (Show Source): You can put this solution on YOUR website!
(a) and (b) do not seem to fit this kind of problem.
y, Harry
x, Hermione
r, Ron

Substitute for y.

;

Sum of their ages:

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