① =
②0.25: =2:x
③ :3=x:4
④ : =x:0.1
⑤40: =x:1
⑥ =
3:x=9:15
① ②
③ ④12.45:x=4.15:3
①
②
③
④
①80%x﹣0.4×1.2=1.2
②(27.5﹣3.5)÷x=4
③4:(1﹣x)=
①6x=18
②x:0.4=10:
③x﹣60%x=2
④=
x
3
☆
y
4
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