I have no clue how to solve these
3) X + 5/6 = 7/16

4) Y + 1/7 = 5/8

11) X – 4 3/8 = 6

13) Y – 4.8 = 9.2

14) B – 4 1/4 = 2 2/3

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236