Question

Maggie's brother is 8 years younger than four times her age. The sum of their ages is 67.

How old is maggie?

Answer 1

Set up a system of equations
4m-8=b
m+b=67

Solve by substituting for what b equals
4m-8= 67-m
5m= 75
m=15

So she is 15 years old

Answer 2

I think she is 15 years old