Question 899154
Joan's age now = x + 5

Rob's age now = x


(x + 5) - 10 + x - 10 = 25


x + 5 - 10 + x - 10 = 25


2x + 5 - 20 = 25


2x - 15 = 25


2x = 15 + 25


2x = 40


x = 40/2


x = 20


Rob is 20 years old.


Joan is 25 years old.