Problema Solution
Greg is 16 years older than his sister Barbara. In 13 years, he will be twice as old as Barbara. How old is each of them now?
Answer provided by our tutors
let
g = Greg's age now
b = Barbara's age now
Greg is 16 years older than his sister Barbara:
g = b + 16
In 13 years, he will be twice as old as Barbara:
g + 13 = 2(b + 13)
by solving the system of equations:
g = b + 16
g + 13 = 2(b + 13)
we find:
g = 19 years
b = 3 years
click here to see the step by step solution of the system of equations:
Greg is 19 years old now.
Barbara is 3 years old now.