Решить уравнения:x/9 - 7/9 = 3  7/95  4/15 - x/15 = 4  7/153  18/19+ x/19= 15/19

x/9 - 7/9 = 3  7/9 х/9 = 34/9 + 7/9 х/9 = 41/9 х = 41/9 * 9 х = 41 41/9 - 7/9 = 3 7/9 34/9 = 3 7/9 3 7/9 = 3 7/9 5  4/15 - x/15 = 4  7/15 79/15 - х/15 = 67/15 х/15 = 79/15 - 67/15 х/15 = 12/15 х = 12/15 * 15 х = 12 79/15 - 12/15 = 67/15 67/15 = 67/15 4 7/15 = 4 7/15 3  18/19+ x/19= 15/19 75/19 + х/19 = 15/19 х/19 = 15/19 - 75/19 х/19 = - 60/19 х = - 60/19 * 19 х = - 60 75/19 + (- 60/19) = 15/19 75/19 - 60/19 = 15/19 15/19 = 15/19

x/9 - 7/9 = 3  7/9 х\9=3 7\9+7\9 х\9=3 14\9 х=41\9*9\1 х=41 5  4/15 - x/15 = 4  7/15 -х\15=4 7\15-5 4\15 -х\15=-4\5 -х=-4\5*5\1 -х=-4 х=4 3  18/19+ x/19= 15/19 х\19=15\19-3 18\19 х\19=-60\19 х=-60\19*19\1 х=-60