Question

Me ajudem nessa?
20-{-10-[-8+(5-12)]-20}

Answer 1

= 20-{-10-[-8+(5-12)]-20}
= 20-{-10-[-8+(-7)]-20}
= 20-{-10-[-8-7]-20}
= 20-{-10-[-15]-20}
= 20-{-10+15-20}
= 20-{-30+15}
= 20-{-15}
= 20+15
= 35