Question 1
Riley is 4 times as old as his son Riya. After 5 years, the sum of their ages will be 85. How old is Riya now?
Let son's age = x, then father's age = 4x
After 5 years: (4x+5) + (x+5) = 85
(4+1)x + 10 = 85
(5)x = 75
x = 15
After 5 years: (4x+5) + (x+5) = 85
(4+1)x + 10 = 85
(5)x = 75
x = 15