This is a fraction, and the sum of the numerator and denominator is 43. If 4 is added to the numerator and 4 is added to the denominator, then the simplified result is (7/10). Find the original fraction?
这是一个分数，分子、分母之和是43，如果分子加上4，分母也加上4后化简得(7/10)，求出原来这个分数？
<gadget id="calculator">43 + 4 + 4</gadget>
<output>51</output>

<gadget id="calculator">7 + 10</gadget>
<output>17</output>

<gadget id="calculator">7 / 17</gadget>
<output>7/17 = around 0.411765</output>

<gadget id="calculator">51 * (7/17)</gadget>
<output>21</output>

<gadget id="calculator">21 - 4</gadget>
<output>17</output>

<gadget id="calculator">10 / 17</gadget>
<output>10/17 = around 0.588235</output>

<gadget id="calculator">51 * (10/17)</gadget>
<output>30</output>

<gadget id="calculator">30 - 4</gadget>
<output>26</output>

<gadget id="calculator">17 / 26</gadget>
<output>17/26 = around 0.653846</output>

<result>17/26 = around 0.653846</result>