C 1427. 1) [2(x + y) – x + 6 = 0,
3x – (x – y) = 0;
3) [5x – 2 (y + 4) = 0,
6(2x + 3) - y - 41 = 0;
+
1436.
2) 3(x + 2y) - y - 27 = 0,
4(x + y) – 3x – 23 = 0;
4) 2x + 3(x + y) - 11 = 0,
| 7 (x + 3y) – 6x + 59 = 0.​

Duxa22    1   29.04.2021 12:13    1