Plug in 3D for the K values in the second equation.
3D - 4 = 5(D - 4) Use the Distributive Property 3D - 4 = 5D - 20 Add 4 to both sides 3D = 5D - 16 Subtract 5D from both sides -2D = -16 Divide both sides by -2 D = 8 Now, plug that D value into the original equation.
K = 3D Plug in the D value K = 3(8) Multiply K = 24
4 years ago, Daniel would've been 4 and Kevin would be 20, so Kevin would've been 5 times as old as Daniel. And 8 x 3 = 24. Therefore, the answer to your query is that Kevin is 24 years old. Hope this helped and have a great day!
