Final answer:
The grandfather's age is 54 years.
Step-by-step explanation:
To solve this problem, we can set up a system of equations. Let's assume Steve's age is x and his grandfather's age is y.
According to the given information, the ratio of Steve's age to his grandfather's age is 1/6. So we can write the equation:
x/y = 1/6
Since the sum of their ages is 63 years, we can also write the equation:
x + y = 63
We can solve this system of equations by substitution or elimination. Let's use substitution. Rearranging the first equation, we get:
x = (1/6)y
Substitute this expression for x in the second equation:
(1/6)y + y = 63
Combine like terms and solve for y:
(7/6)y = 63
y = 63/(7/6) = 54
So the grandfather's age is 54 years.