The difference between two numbers is 28. If the minuend is decreased by 3 and the subtrahend is increased by 5, what is the difference between them?
两个数相差28，如果被减数减少3，减数增加5，那么它们的差是多少．
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">28 - 8</gadget>
<output>20</output>

<result>20</result>