Question

x-y=1
тремя способами пж 2x-2y=3​

Answer 1

Ответ:

x - y = 1

2x - 2y = 3

x = 1 - y

2 (1 - y) - 2y = 3

x = 1 - y

2 - 4y = 3

x = 1 - y

-4y = 1

y = -1/4

x = 2 1/4