x:10=6:5 = 0.4:3.2=x:9.6
x:0.25=4:5.5
5:0.4=6:x
x:3. 5=3 :4 := :x
= x∶3.25=∶
2x+30%x=13.8 13:x=6.5:4
:x=: 2:=3.6:x 12-4x=2.4
x:=0.5: = 0.2x-1.5=
3.75:x=3:12 (x-0.6)× =2.25 25%: =x:
x÷=4 x+60%x=22 3.6 :1.2=
①m一定是偶数、②(m,n)=4③n是m的25%④m:4=n:1⑤ (n÷10) × (4÷10) =m