It is known that m◇n means 3 times of m minus 2 times of n, that is, m◇n=3m-2n: known x◇(4◇1)=7. Find the value of x.
已知m◇n表示m的3倍减去n的2倍，即m◇n=3m-2n：已知x◇(4◇1)=7．求x的值．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">2 * 1</gadget>
<output>2</output>

<gadget id="calculator">12 - 2</gadget>
<output>10</output>

<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">7 + 20</gadget>
<output>27</output>

<gadget id="calculator">27 / 3</gadget>
<output>9</output>

<result>9</result>