Răspuns :
(45+27)-a=39
72-a=39
a=72-39
a=33
b-(25+19)=38
b-44=38
b=38+44
b=82
(6×c)+49=73
6×c=73-49
6×c=24
c=24:6
c=4
(81:d)×6=54
81:d=54:6
81:d=9
d=81:9
d=9
Răspuns:
(45 + 27) - a = 39
72 - a = 39
72 - 39 = a
a = 33
b-(25+19) = 38
b - 44 = 38
b = 38 + 44
b = 82
(6×c)+49 = 73
6c + 49 = 73
6c = 73 - 49
6c = 24
c = 4
81/d × 6 = 54
486/d = 54/1
d = 486/54
d = 9