If 7x+1=15, what is 40-5.5x equal to
如果7x+1=15，那么40-5.5x等于多少
<gadget id="calculator">15 - 1</gadget>
<output>14</output>

<gadget id="calculator">14 / 7</gadget>
<output>2</output>

<gadget id="calculator">5.5 * 2</gadget>
<output>11</output>

<gadget id="calculator">40 - 11</gadget>
<output>29</output>

<result>29</result>