(780-m*60):6=70
780-60m=70*6
780-60m=420
60m=780-420
60m=360
m=360:60
m=6
70 на 6 =420
780 на 420 =360
360 на 60 =6
(780-m*60):6=70
780-60m=70*6
780-60m=420
60m=780-420
60m=360
m=360:60
m=6
70 на 6 =420
780 на 420 =360
360 на 60 =6