maschachmil

20.07.2021 15:21 •  Математика

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