x/4=3/6=>6x=12=>x=12:6=>x=2
4/x=2/5=>2x=20=>x=20:2=>x=10
6/2=x/7=>2x=42=>x=42:2=>x=21
3/5=4/x=>3x=20=>x=20:3=>x=6,(6)
x/0,5=0,2/0,01=>x•0,01=1=>x=1:0,01=>x=100
x/2,(3)=1,5/0,(6)=>6x/9=7/2=>12x=63=>x=5,25
1/3/x=4/5/9/2=>1/3:x/1=4/5:9/2=>x/3=18/5=>5x=54=>x=54/5=10,8
