Question

el resultado de 8{-1+5(4-6)-7[-9+(-3)(-2)]}-20 es igual a

Answer 1

 8{-1+5(4-6)-7[-9+(-3)(-2)]}-20=
8{-1+5(-2)-7[-9+6]}-20=
8[-1-10-7(-3)]-20=
8(-11+21)-20=
8(10)-20=
80-20=
60