Respostas

2014-05-24T12:21:45-03:00
83 = (9*9) + p
83 = 81 + p
-p = 83 - 81
p = 2
2014-05-24T12:33:17-03:00
83 = (9.9) + P
83 = 81 + P
-P = 81 - 83
-P =  -2   (-1)
P = 2
1 5 1