5 5/12+(1,375-x)=6 1/6
5 5/12+(1,375-х)=6 1/6 5 5/12+1 3/8-х=6 1/6 5 10/24+1 9/24-6 4/24=х х=15/24 х=5/8
5 5/12 + (1,375 - х) = 6 1/6 65/12 + 1,375 - x = 37/6 -x = 37/6 - 65/12 - 1,375 -x = 74/12 - 65/12 - 1,375 -x = 9/12 - 1,375 -x = 0,75 - 1,375 -x = -1,3 x = 1,3 Ответ: 1,3