Question

expressões: 20+{-16-[-15-(8+-15)+14]}=0

Answer 1

20+{-16-[-15-(8+(-15)+14]}=0
20+{16-[-15-(8-15)+14]}=0
20+{16-[-15-(-7)+14]}=0
20+{16-[-15+7+14]}=0
20+{16-[-15+21]}=0
20+{16-6}=0
20+10=0
30=0