Solve the equation: (13+x)*2=38.
解方程：(13+x)*2=38．
<gadget id="calculator">13 * 2</gadget>
<output>26</output>

<gadget id="calculator">38 - 26</gadget>
<output>12</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<result>6</result>