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Question
What quantity must be subtracted from each term of the ratio 39 : 89 to make it equal to 2 : 5 ?
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Solution
Let x be subtracted from each term such that
`(39 - "x")/(89 - "x") = 2/5`
⇒ 195 - 5x = 178 - 2x
⇒ 3x = 17
⇒ x = `17/3`
`17/3` should be subtracted from each term.
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