5a + b = 60
-b + a = 0
b = -5a + 60
-(-5a + 60) + a = 0
5a - 60 + a = 0
6a = 60
a = 10
50 + b = 60
b = 10
ответ: (10; 10)
5a + b = 60
-b + a = 0
b = -5a + 60
-b + a = 0
-(-5a + 60) + a = 0
5a - 60 + a = 0
6a = 60
a = 10
50 + b = 60
b = 10
ответ: (10; 10)