3.75:x=3:12 (x-0.6)× =2.25 25%: =x:
x-38x=15 40%:x=0.2:4.5 25(x+13)=650
78 + 18x=2 8∶x =13∶116 50%x-9×3=25
x:56=0.5:38 x5=415 0.2x-1.5=12