Question

Kevin is 3 times as old as

Daniel. 4 years ago, Kevin was 5 times as old as Daniel.
How old is Daniel now?

Answer 1

Daniel is 8 years old now.

Explanation:

From the word problem we can make the following two equations:

Let "K" be Kevin's age now and let "D" be Daniel's age now, then...

K = 3D

K - 4 = 5(D - 4)

Now we substate the value of K, and get...

K - 4 = 5(D - 4)

3D - 4 = 5(D - 4)

3D - 4 = 5D - 20

3D - 5D = - 20 + 4

- 2D = - 16

D = 8

Therefore Daniel is 8 years old now.