Question:What number should be subtracted from both the terms of the ratio `15 : 19` so as to make it as `3 : 4`?
A `3` B `5` C `6` D `9`
+ AnswerA
+ ExplanationLet `x` be subtracted. Then, `(15 - x)/(19 - x) = 3/4` `iff 4(15 - x) = 3(19 - x)` `iff x = 3`.
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