Răspuns :
a + b = 52
a : b = 3 rest 4
a = b x 3 + 4
3b + 4 + b = 52
4b = 52-4
4b = 48
b = 48 : 4
b = 12
a = 3b + 4
a =12 x 3 + 4
a = 36 + 4
a = 40
a : b = 3 rest 4
a = b x 3 + 4
3b + 4 + b = 52
4b = 52-4
4b = 48
b = 48 : 4
b = 12
a = 3b + 4
a =12 x 3 + 4
a = 36 + 4
a = 40