a) y = 14x - a/7 - 2
11 = 14 * 8 - a/7 - 2
11 = 112 - a/7 - 2
11 = 110 - a/7
a/7 = 110 - 11
a/7 = 99
a = 99 * 7
a = 693
б) y = 14x - a/7 - 2
2 = 14x - 42/7 - 2
2 = 14x - 6 - 2
2 = 14x - 8
14x = 2 + 8
14x = 10
x = 10 / 14
x = 5 / 7
Ответ: a) a = 693; б) x = 5/7