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Find In ratio and proportion, if x:30=12:20, then find x

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Your problem `->` In ratio and proportion, if x:30=12:20, then find x


`x:30=12:20`

`x/30=12/20`

`=>(x)/(30)=(12)/(20)`

`=>x xx 20=12 xx 30`

`=>20x=360`

`=>x=360/20`

`=>x=18`






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