sachin is younger than rahul by 7 years . if the ratio of their ages is 7 : 9 , find the age of sachin
"if rahul age is x , then sachin age is x - 7 , so ( x - 7 ) / x = 7 / 9 = > 9 x - 63 = 7 x = > 2 x = 63 = > x = 31.5 so sachin age is 31.5 - 7 = 24.5 answer : b"
multiply(divide(7, subtract(9, 7)), 7)