y
x
y = 5x - 1
5(5x - 1) - 2x = 5
25x - 5 - 2x = 5
23x = 10
x = 10/23
y = 5 * (10/23) - 1
y = 50/23 - 23/23
y = 27/23
Ответ: x = 10/23, y = 27/23