Question

Operaciones combinadas :
A)-5-(-8)+{-9-[-6-+(5-9)]-[9-7-6]}
b)-{-7+[-6+15-(-9+13+17)-(6-5)]}
C)-9-[15-(7-8)-6][9-(6-3)]
D)-{14-[9-(6-17)-3-]-[-5-(8-3-7)]}
E)-19-[-7-(6-3-19)]-[-9-2-7]

Answer 1

a) -5-(-8)+{-9-[-6+(5-9)]-[9-7-6]}
    -5+8+{-9-[-6-4]-[9-7-6]}
    -5+8+{-9+10+4}
    -5+8+5= +8 R//

Answer 2

Respuesta:

A) 8

B) 20

C) -7

D) 0

E) - 10

Explicación paso a paso:

A) - 5-(-8)+{-9-[-6+(5-9)]-[9-7-6]}=

-5+8+{-9-[-6+(-4)]-[-4]}=

3+{-9-[-6-4]+4}=

3+{-9-[-10]+4}=

3+{-9+10+4}=

3+{5} =3+5=8

B) -{-7+[-6+15-(-9+13+17)-(6-5)]}=

-{-7+[9-(21)-(1)]}=

-{-7+[9-21-1]}=

-{-7+[-13]}=

-{-7-13}=-{-20}=20

C) - 9-[15-(7-8)-6]-[9-(6-3)]=

-9-[15-(-1)-6]-[9-(3)]=

-9-[15+1-6]-[9-3]=

-9-[10]-[6]=-9-10-6=-7

D) -{14-[9-(6-17)-3]-[-5-(8-3-7)]}=

-{14-[9-(-11)-3]-[-5-(-2)]}=  

-{14-[9+11-3]-[-5+2]}=

-{14-[17]-[-3]}=

-{14-17+3}=0

E) - 19-(-7-(6-3-19))-(-9-2-7)=

-19-(-7-(-16))-(-18)=

-19-(-7+16)+18=

-19-(9)+18=

-19-9+18=-10

espero que te sirva