(x - 0.5) : (2 3/4) = (1 9/11) : (5/7);
(x - 1/2) : (11/4) = (20/11) * (7/5);
(x -1/2) = (20/11) * (7/5) * (11/4);
x - 1/2 = 7;
x = 7 + 1/2;
x = 7 1/2 = 7.5;
(x - 0.5) : (2 3/4) = (1 9/11) : (5/7);
(x - 1/2) : (11/4) = (20/11) * (7/5);
(x -1/2) = (20/11) * (7/5) * (11/4);
x - 1/2 = 7;
x = 7 + 1/2;
x = 7 1/2 = 7.5;