Решите уравнения (780-783).
780. 1) 2x + 17 - 22 + 3x; 4) 13х + 27 = 16х + 4,5;
2) 18 + 3x = x +14;
5) 21х + 45 = 17 + 14х;
3) 25 - 4х = 12 - 5x;
6) 13х + 70 = 2х +15.​
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