(546-478)у=272
68у=272
у=272:68
у=4
Проверка
(546-478)*4=272
68*4=272
272=272
546-478=68
68y=272
y=272/68
y=4
(546-478)у=272
68у=272
у=272:68
у=4
Проверка
(546-478)*4=272
68*4=272
272=272
546-478=68
68y=272
y=272/68
y=4