Problema Solution
Donna is 12 years younger than her brother. In 2 years, she will be 14 years more than half as old as her brother. How old is each now?
Answer provided by our tutors
let
d = the present age of Donna
b = the present age of Donna's brother
Donna is 12 years younger than her brother:
d = b - 12
In 2 years, she will be 14 years more than half as old as her brother:
d + 2 = 14 + (1/2)b
by solving the system of equations:
d = b - 12
d + 2 = 14 + (1/2)b
we find:
d = 36 years
b = 48 years
click here to see the step by step solution of the system of equations:
Donna is 36 years old now, and her bother is 48 years old now.