10/8/5х+5/х=9/20
10÷8/5х+5/х=9/20
10×5/8х+5/х=9/20
5×5/4х+5/х/=9/20
25/4х+5/х=9/20
25/4х+20/4х=9/20
45/4х=9/20
36х=900
х=900÷36
х=25
10/8/5х+5/х=9/20
10÷8/5х+5/х=9/20
10×5/8х+5/х=9/20
5×5/4х+5/х/=9/20
25/4х+5/х=9/20
25/4х+20/4х=9/20
45/4х=9/20
36х=900
х=900÷36
х=25