Решите уравнение 2/5m+3/10m-2/15m=1/6
Общ.знамен.= 30 2/5=12/30 3/10=9/30 2/15=4/30 12/30m+9/30m-4/30m=1/6 17/30m=1/6 1/6 / 17/30 m=1/17