(a)   ﹣8 = 5

(a)   ﹣5 = 9

(a)   ﹣8 = 10

(a)   ﹣6 = 9

(a)   ﹣7 = 7

(a)   ﹣7 = 5

(a)   ﹣6 = 6

(a)   ﹣5 = 9

(a)   ﹣9 = 4

(a)   ﹣8 = 7

(a)   ﹣6 = 8

(a)   ﹣7 = 6

(a)   ﹣3 = 9

(a)   ﹣8 = 6

(a)   ﹣6 = 9

(a)   ﹣9 = 7

(a)   ﹣7 = 8

(a)   ﹣9 = 5

(a)   ﹣8 = 8