(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