Răspuns :
a + b = 56
a - b = 56 : 7
a - b = 8 = > a = 8 + b
8 + b + b = 56
8 + 2b = 56
2b = 56 - 8
2b = 48
b = 48 : 2
b = 24
a = 24 + 8
a = 32
a + b = 56
a - b = 56 : 7
a - b = 8 = > a = 8 + b
8 + b + b = 56
8 + 2b = 56
2b = 56 - 8
2b = 48
b = 48 : 2
b = 24
a = 24 + 8
a = 32