Solve the equation: 6*(9-x)=18.
解方程：6*(9-x)=18．
<gadget id="calculator">6 * 9</gadget>
<output>54</output>

<gadget id="calculator">54 - 18</gadget>
<output>36</output>

<gadget id="calculator">36 / 6</gadget>
<output>6</output>

<result>6</result>