If x*(15/14)=y*(14/15)=1, then 5x-2y=how much.
如果x*(15/14)=y*(14/15)=1，那么5x-2y=多少．
<gadget id="calculator">15 / 14</gadget>
<output>15/14 = around 1.071429</output>

<gadget id="calculator">1 / (15/14)</gadget>
<output>14/15 = around 0.933333</output>

<gadget id="calculator">5 * (14/15)</gadget>
<output>14/3 = around 4.666667</output>

<gadget id="calculator">2 * (15/14)</gadget>
<output>15/7 = around 2.142857</output>

<gadget id="calculator">(14/3) - (15/7)</gadget>
<output>53/21 = around 2.52381</output>

<result>53/21 = around 2.52381</result>