ishaan is 72 years old and william is 4 years old
how many years will it take until ishaan is only 5 times as old as william?

13 years

Step-by-step explanation:

Let the unknown number of years be n.

Then 72 + n = 5(4 + n)

Performing the indicated multiplication,

       72 + n = 20 + 5n

Grouping like terms gives us:

52 = 4n, and so n = 13.

In 13 more years, Ishaan will be 5 times over than William.

.

step-by-step explanation:

.