Question

Решите систему методом подставки:
4y-x=11
5x-2y= 17

Answer 1

4y - x = 11
5x - 2y = 17

4y - 11 = x
5x - 2y = 17

x = 4y - 11
5(4y - 11) - 2y = 17

20y - 55 - 2y = 17
18y = 72
y = 4

x = 4*4 - 11
x = 5

x = 5
y = 4