a certain fraction is equivalent to 3 / 5 . if the numerator of the fraction is increased by 4 and the denominator is doubled , the new fraction is equivalent to 1 / 3 . what is the sum of the numerator and denominator of the original fraction ?
"x / y = 3 / 5 - > 1 ( x + 4 ) / 2 y = 1 / 3 - > 2 divide 1 by 2 : = > 2 x / ( x + 4 ) = 9 / 5 = > 10 x = 9 x + 36 = > x = 36 = > y = 5 / 3 * 12 = 20 so x + y = 56 the answer is d ."
divide(add(multiply(divide(5, 3), 4), 4), 3)