Explain how to use patterns or sequences to determine the last digit of the number 7N, where N is the four-digit year of your birth.

Step-by-step explanation:

The given equation can be simplified to ...

  x +1 = y +1

  x = y . . . . . . subtract 1

The we can divide by 3 to get the form you're looking at:

  x/3 = y/3

If your original equation is ...

  (x +3)/3 = (y +2)/2 . . . . . . . . . with numerator parentheses

Then this simplifies to ...

  x/3 +1 = y/2 +1

Subtracting 1, we find ...

  x/3 = y/2