The sum of the numerator and the denominator of a true fraction is 29, and the difference between the denominator and the numerator is 7. What is the true fraction?
一个真分数的分子与分母的和是29，分母与分子的差是7，这个真分数是多少．
<gadget id="calculator">29 + 7</gadget>
<output>36</output>

<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<gadget id="calculator">18 - 7</gadget>
<output>11</output>

<gadget id="calculator">11 / 18</gadget>
<output>11/18 = around 0.611111</output>

<result>11/18 = around 0.611111</result>