(104,5-96,5)*231= 13*(272-18,7)= 80,16+10,5:25= 119,6:13-5,82= (50-X)+7,16=8,132
8*231=1848 13*253,3=3292,9 80,16+0,42=80,58 9,2-5,82=3,38 (50-х)=8,132-7,16 50-х=0,972 50-0,972=х х=49,028