Вопрос:

25) (2x + 3y = -7, x-y=4

Ответ:

x = 1, y = -3

5) (x+y=6, 5x-2y=9.
6) (x+y=7, 5x-7y=11.
7) (4x-3y=-1, x-5y=4.
8) (2x-5y=-7, x-3y=-5.
9) (3x-5y = 16, 2x+y=2
10) (2x + 5y = -7, 3x-y=15.
11) (2x-3y=5, x-6y=-2.
19) (2x-y=13, 2x + 3y = 9
20) (2x + 3y = 10, x-2y=-9
21) (2x+y=-5, x-3y=-6
22) (4x-3y=-1, x-5y=4.
23) (x+2y=-2, 3x-y=8.
24) (х-у=3, 3x+4y=2