1427. 1) [2(x + y) = x + 6 = 0,
[3x – (x - y) = 0;
3) [5x – 2 (y + 4) = 0,
2x + 3) - y - 41 = 0;
2) 13(x + 2y) - y - 27 = 0,
14(x + y) - 3x – 23 = 0;
4) 2x + 3(x + y)-11 = 0,
7(x + 3y) - 6x + 59 = 0.​

Света1011111    1   11.05.2020 06:23    0