(19/20) is equal to the sum of (7/20) and x, find x.
(19/20)等于(7/20)与x的和，求x．
<gadget id="calculator">19 / 20</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">7 / 20</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">(19/20) - (7/20)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>