He has 3/5 of his cards left because he had 62/105 of his cards and that simplified is 3/5
In this case, 7 is being added to the odometer which already reads 78. If you add 7 to 78, you get 85. Meaning y = 85!
The square root of -18 is 3i√
2
Hope this helps
So the answer to very good question is YES
