Найди число х для которого верно равенство: а)х+1/8=3/5 б)1/3+х=5/12 в)х-3/20=1/5

а)х = 3/5 - 1/8;х = (3 * 8 - 1 * 5)/40;х = (24 - 5)/40;х = 19/40.Проверка:19/40 + 1/8 = 3/5;(19 * 1 + 1 * 5)/40 = 3/5;(19 + 5)/40 = 3/5;24/40 = 3/5;3/5 = 3/5.Ответ: 19/40.б) 1/3 + х = 5/12;х = 5/12 - 1/3;х = (5 * 1 - 1 * 4)/12;х = (5 - 4)/12;х = 1/12.Проверка:1/3 + 1/12 = 5/12;(1 * 4 + 1 * 1)/12 = 5/12;(4 + 1)/12 = 5/12;5/12 = 5/12.Ответ: 1/12.в) х - 3/20 = 1/5;х = 1/5 + 3/20;х = (1 * 4 + 3 * 1)/20;х = (4 + 3)/20;х = 7/20.Проверка:7/20 - 3/20 = 1/5;4/20 = 1/5;1/5 = 1/5.Ответ: 7/20.