How to show my work for 414 divided by 23

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Don't know how to find x given these segment lengths