Answer:
8
Step-by-step explanation:
Let the age of Daniel be X and Kelvin be Y
Now, According to the question,
Y= 4×X................equation I
Also,Y= X+6.................equation II
Finally, Equating both equations, we get
X+6= 4X
or, 6=3X
or, X=2
Now Y= 4×X
= 4×2
= 8