Subtract a fraction from (3/4), add the same fraction to (5/13), and the results of the two calculations are equal. What is the fraction?
将(3/4)减去一个分数，(5/13)加上同一个分数，两次计算结果相等，那么这个分数是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">5 / 13</gadget>
<output>5/13 = around 0.384615</output>

<gadget id="calculator">(3/4) - (5/13)</gadget>
<output>19/52 = around 0.365385</output>

<gadget id="calculator">(19/52) / 2</gadget>
<output>19/104 = around 0.182692</output>

<result>19/104 = around 0.182692</result>