There is a fraction (23/24), a certain number is added to the denominator, and twice the number is subtracted from the numerator, the value of the fraction becomes (1/2), what is the certain number.
有一个分数(23/24)，分母加上某数，而分子减去此数的2倍，分数值变为(1/2)，某数是多少．
<result>4.4</result>