Question

x+3=11, x+7=19, x-8=5, x-9=4, 60-x=59, 12-x=12.

Answer 1

8,12, 13, 13,1,0 как то так 

Answer 2

9+3=11 ;  12+7=19 ; 13-8=5 ; 13-9=4 ; 60-1=59 ; 12-0=12