Question

найди х:8/9=0,2х/0,45;18,2/5,6=19,5/4х;6/7=3,5х/24,5

Answer 1

0.45х=0.2*9\8
0.45х=2\10*9\8
0.45х=9\40
х=9\40*100\45
х=1\2=0.5

18.2*4х=19.5*5.6
72.8х=109.2
х=109.2:72.8
х=1.5

6*24.5=3.5х*7
147=24.5х
х=147:24.5
х=6