Answer:
The granddaughter is 6 years old and the grandfather is 60 years old.
Step-by-step explanation: Present the age of the granddaughter as X years.
10x = x + 54
10x - x = 54
9x = 54
x = 54/9 = 6 years.
So, granddaughter’s age = 6 years and grandfather’s age = 10 x 6 = 60 years.
Hope this helps love! ^-^