Question 1
Currently, Piper is 3/4 of Sophie's age. After 5 years, Piper will be 4/5 of Sophie's age. Find Piper's present age.
Let Sophie = x, then Piper = 3/4x
After 5 years: 3/4x + 5 = 4/5(x + 5)
Solving gives x = 20, so Piper = 15
After 5 years: 3/4x + 5 = 4/5(x + 5)
Solving gives x = 20, so Piper = 15