(37/36+у)*27/47*8/20=3/10,
37/36+у=(3*47*20)/(10*27*8),
у=47/72-37/36,
у=-3/8
(43/36+y) * 27/47 * 8/20 = 3/10
(43/36+y) * 27/47 * 4/5 = 3/10 / 27/47*2/5
43/36+y=47/36
y=47/36-43/36
y=1/9
