Răspuns:
a + b = 55
a : b = 4 => a = 4b
4b + b = 55
5b = 55
b = 55 : 5
b = 11
a = 4b = 4 x 11
a = 44
SALUT!
A+B=55
4B + B= 55
5B=55
B=55:5
B=11
A=4×11
A=44
