Question

3. Eсепте.21-6= 13+5=[] 31-8=口口 28 +3=[] 22-6=口25-6=口口​

Answer 1

21-6=15

13+5=18

31-8=23

28+3=31

22-6=16

25-6=19

Answer 2

It seems like you're providing a series of mathematical equations and replacing some numbers with characters like "口". However, it's not entirely clear what the pattern or logic behind this substitution is. Could you please provide more context or information about the pattern you're using? This will help me understand the equations and provide a meaningful response.