Răspuns :
a + 27 = 71
a = 71 - 27
a = 44
b + 35 = 58
b = 58 - 35
b = 23
81 - c = 36
81 - 36 = c
c = 45
a = 71 - 27
a = 44
b + 35 = 58
b = 58 - 35
b = 23
81 - c = 36
81 - 36 = c
c = 45
a+27=71 b+35=58 81-c=36
a=71-27 b=58-35 c=81-36
a=44 b=23 c=45 P=44+27=71 P=23+35=58 P=81-45=36
a=71-27 b=58-35 c=81-36
a=44 b=23 c=45 P=44+27=71 P=23+35=58 P=81-45=36