Question

A boys age is three times the age of his sister. Their ages together total 16 years. What’s is the age of each

Answer 1

Answer: Boy: 48, Sister: 16

Explanation:

You could write a system of equations... x represents the boy and y represents the sister.

x = 3y

x+y=16

You can use substitution. Replace the x in the second equation with 3y since they have the same value.

(3y)+y=16

4y=16

y=16

Now, you can plug y into either equation. I'll use the first one.

x= 3(16)

x= 48