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Question
If the ratio between 8 and 11 is the same as the ratio of 2x - y to x + 2y, find the value of `(7"x")/(9"y")`
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Solution
`(2"x" - "y")/("x" + 2"y") = 8/11`
22x - 11y = 8x + 16y
14x = 27y
`"x"/"y" = 27/14`
Given, `(7"x")/(9"y") = (7 xx 27)/(9 xx 14) = 3/2`
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