1,(2-x):5=3/20
2-x=15/20 2-x=3/4 x=5/4
2.04x:2=2:5%
0.4x*5%=4 2x%=4 x=200
3 .4/9:1/6=(x-2):15
8/3=(x-2):15 40=x-2 x=42