= 1.8:5.4=x:2.4 x:8=:
3x+6=12.6 :x=:
3x﹣1.5x=22.5
x:0.8=0.25:
1+x=
x﹣20%x=40 5x+18=48 :=15:x
=
7.2:x=
解:3.6x=57.6
3.6x÷3.6=57.6÷3.6
x=16
①80%x﹣0.4×1.2=1.2
②(27.5﹣3.5)÷x=4
③4:(1﹣x)=
④
①6x=18
②x:0.4=10:
③x﹣60%x=2
④=
x
3
☆
y
4
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