1/4
_________ +2/5=1/2
3/4x-1/4

должно быть 4

но всеравно спс

ты сдесь

1/4:(3/4х-1/4)+2/5=1/21/4:(3/4х-1/4)=1/2-2/51/4:(3/4х-1/4)=5/10-4/101/4:(3/4х-1/4)=1/103/4х-1/4=1/4:1/103/4х-1/4=10/43/4х=10/4+1/43/4х=11/4х=11/4:3/4х=11/3х=3 2/3Если в знаменателе -1/2, то:1/4:(3/4х-1/2)+2/5=1/21/4:(3/4х-1/2)=1/2-2/51/4:(3/4х-1/2)=5/10-4/101/4:(3/4х-1/2)=1/103/4х-1/2=1/4:1/103/4х-1/2=5/23/4х=5/2+1/23/4х=6/2   =>3х=3:3/4х=4