3 times x plus the product of 6 and 8, the sum is 84, find x.
x的3倍加上6与8的积，和是84，求x．
<gadget id="calculator">6 * 8</gadget>
<output>48</output>

<gadget id="calculator">84 - 48</gadget>
<output>36</output>

<gadget id="calculator">36 / 3</gadget>
<output>12</output>

<result>12</result>