The number A is 18, which is 4 less than twice the number B. Find the number B. What is the correct column
甲数是18，比乙数的2倍少4，求乙数．正确的列式为多少
<gadget id="calculator">18 + 4</gadget>
<output>22</output>

<gadget id="calculator">22 / 2</gadget>
<output>11</output>

<result>11</result>