Question

qual e o resultado de 40+[15+(12-7)+3]-9

Answer 1

40 + [ 15 + (12 - 7) + 3] - 9 =
40 + [ 15 + 5 + 3] - 9 =
40 + 23 - 9 =
63 - 9 =
54

Answer 2

40+[15+5+3]-9
40+[20+3]-9
40+23-9
63-9 = 54