1) [2(x + y) - x+ 6 = 0,
3x - ( - y) = 0;
3) (5x - 2(y + 4) = 0,
16 (2x + 3) - 9 - 41 = 0;
2) 3(x + 2y) - 9 - 27 = 0,
14(x + y) - 3x - 23 = 0;
4) (2x + 3(x + y) - 11 = 0,
17 (x + 3y) - 6x + 59 = 0.
204
299
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