Problema Solution
mark is five years younger than ina. next year, the sum of their ages will be 39. how old are they now?
Answer provided by our tutors
Let
x = the present age of Mark
y = the present age of Ina
Mark is 5 years younger than Ina:
x = y - 5
The sum of their ages last year was 39:
(x - 1) + (y - 1) = 39
We have the following system of equations:
x = y - 5
(x - 1) + (y - 1) = 39
........
click here to see the system of equations solved for x and y
........
x = 18 years
y = 23 years
Mark is 18 years old now.
Ina is 23 years old now.