The sum of the two numbers of A and B is 20. The sum of 3 times the number A and 5 times the number B is 74. What is the difference between A and B?
甲乙两数的和是20，甲数的3倍与乙数的5倍的和为74，甲与乙的差是多少．
<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<gadget id="calculator">100 - 74</gadget>
<output>26</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">26 / 2</gadget>
<output>13</output>

<gadget id="calculator">20 - 13</gadget>
<output>7</output>

<gadget id="calculator">13 - 7</gadget>
<output>6</output>

<result>6</result>