Respuesta :

15-20 is -5. If you put 15 on a number line and go back twenty spaces you land on -5 hope this helps.
1bruh6
ok so one of the halves will always be half of the other so 
15) NL = 5 because since JM = 14 Mk =7 because it is half of JM same goes for the other side since JN =10 NL =5
i hope this helped

good job