5 * (1 2/5 + х) - 2 3/4 = 23 1/4 = 5 (7/5 + х) - 2 3/4 = 93/4 = 7 + 5х - 2 3/4 = 93/4 = 7 + 5х - 11/4 = 93/4 = 17/4 + 5х = 93/4 = 5х = 93/4 - 17/4 = 5х = 19 = х = 19/5
5 * (1 2/5 + х) - 2 3/4 = 23 1/4 = 5 (7/5 + х) - 2 3/4 = 93/4 = 7 + 5х - 2 3/4 = 93/4 = 7 + 5х - 11/4 = 93/4 = 17/4 + 5х = 93/4 = 5х = 93/4 - 17/4 = 5х = 19 = х = 19/5