(9767-х):75=6794:79 352*(х+79)=464*176 13720:(189-с)=13965:57 139*(x-202)=278×23 x:84*42+1256=3104

(9767-х):75=6794:79, (9767-х):75=86,  9767-х=75*86, 9767-х=6450, х=9767-6450, х=3317352*(х+79)=464*176, 352*(х+79)=81664, х+79=81664:352, х+79=232, х=232-79,  х=15313720:(189-с)=13965:57, 13720:(189-с)=245, 189-с=13720:245, 189-с=56, с=189-56, с=133139*(х-202)=278*23, 139*(х-202)=6394, х-202=6394:139, х-202=46, х=46+202, х=248х:84*42+1256=3104, х:84*42=3104-1256, х:84*42=1848, х:84=1848:42, х:84=44, х=44*84, х=3696