It is known that 4x+6=22, then x+9=how much.
已知4x+6=22，那么x+9=多少．
<gadget id="calculator">22 - 6</gadget>
<output>16</output>

<gadget id="calculator">16 / 4</gadget>
<output>4</output>

<gadget id="calculator">4 + 9</gadget>
<output>13</output>

<result>13</result>