7.9/16-(x-2.3/16)=4.11/16 CРОЧНО
7 9/16 - ( x - 2 3/16 ) = 4 11/16 7 9/16 - x + 2 3/16 = 4 11/16 9 12/16 - x = 4 11/16 x = 9 12/16 - 4 11/16 x = 5 1/16