1)5х=8.17+2.48 2) х+2х=21.42 3) 7х-4х=0.96

1) 5х = 8,17 + 2,48
5х = 10,65
х = 2,13
2) х + 2х = 21,42
3х = 21,42
х = 7,14
3) 7х - 4х = 0,96
3х = 0,96
х = 0,32