Question

12-{-6+7-[8-4-9-(5+6-8-9)]} para agr por favor

Answer 1

12-{-6+7-[8-4-9-(5+6-8-9)]}
12-{-6+7-[8-4-9-(11-8-9)]}
12-{-6+7-[8-4-9-(11-17)]}
12-{-6+7-[8-4-9+6]}
12-{-6+7-[8-4-3]}
12-{-6+7-[8-7]}
12-{-6+7-1}
12-0
12