1) х+3/65=4/13 3)5х-8/5+18/45
х=4/13-3/65 5*х-1,2
х=17/65 х=1,2/5
2)7/х+4=21/60 х=0,24
7/х+4=21/60
7/х+4=7/20
7/х=7/20-4
7/х=-73/20
х=-140/73
х=1 67/73
1) х+3/65=4/13 3)5х-8/5+18/45
х=4/13-3/65 5*х-1,2
х=17/65 х=1,2/5
2)7/х+4=21/60 х=0,24
7/х+4=21/60
7/х+4=7/20
7/х=7/20-4
7/х=-73/20
х=-140/73
х=1 67/73