6 times of x is 126 more than 3 times of 6, find x.
x的6倍比6的3倍多126，求x．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">126 + 18</gadget>
<output>144</output>

<gadget id="calculator">144 / 6</gadget>
<output>24</output>

<result>24</result>