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प्रश्न
If (4x + 3y) : (3x + 5y) = 6 : 7, find x : y
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उत्तर
7x (4x + 3y) = 6x (3x + 5y)
28x + 21y = 18x + 30y
28x − 18x = 30y − 21y
10x = 9y
`"x"/"y"=9/10`
∴ x : y = 9 : 10
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