1. y= 2/5 because 2/5 + 2/5 = 4/5
2. x = 4/8 because 4/8 - 3/8 = 1/8
3. d = 1 or 5/5 because 1 ( or 5/5 ) - 1/5 = 4/5
Tip - use inverse operation to get the answers. For example for 1 since 2/5 is a positive number I subtracted 4/5 - 2/5 and that’s how I got 2/5 for 1. :D