Răspuns:
Explicație pas cu pas:
a + b = 10
a/b = 3/7
a = 3b /7
3b/7 + b = 10 / × 7
3b + 7b = 70
10b = 70
b = 70 : 10 = 7
a = 3b/7 = 3×7/7 = 21/7 = 3
a × b = 3 × 7 = 21
a + b = 3 + 7 = 10
a + b = 10
a / b = 3 / 7
a = 3 b / 7
3 b / 7 + b = 10
3 b + 7 b = 70
10 b = 70
b = 70 : 10
b = 7
a = 3 × 7 / 7
a = 21 / 7
a = 3
