18-(18-16)-(7+8)+9= 9+8-(12+5-13)= (13+7)-20+(17-8)= 17-(7-5)-(20-13)=

Question

18-(18-16)-(7+8)+9= 9+8-(12+5-13)= (13+7)-20+(17-8)= 17-(7-5)-(20-13)=

Answer 1

18-2-15+9=10
9+8+4=21
20-20+9=9
17-2-7=8