(7/12+1 1/10 x):7 1/4=1/3.
(7/12 + 11/10 x) : 7 1/4 = 1/3 7/12 + 11/10 x = 1/3 * 29/4 11/10 x = 29/12 - 7/12 11/10 x = 22/12 x = 22/12 : 11/10 x = 5/3 x = 1 2/3 Ответ: {1 2/3}