найдите x: 1)8x/0,5=8,4/0,15
2)8/9=0,2x/0,45
3)18,2/5,6=19,5/4x
4)6/7=3,5x/24,5

8х/0,5=8,4/0,158х=0,5*8,4 /0,15х=4,2/8*0,15х=3,58/9=0,2х/0,450,2х=8*0,45/9х=0,4/0,2х=218,2/5,6=19,5/4х4х=5,6*19,5/18,2х=6/4х=1,56/7=3,5х/24,53,5х=6*24,5/7х=21/3,5х=6