Dear Student,
Let the original number of crayons were x.
Now, x - 5 =15 (As 5 crayons were removed and after that number of crayons were 15)
=> x =5 +15 = 20
Now 20 crayons are in 2 box .
So no. of crayons in each box will be, 20 divided by 2 => 20/2 = 10
No. of crayons in each box will be 10.
Regards