What is the solution of the equation 2X-12+3=9 X=
方程2X-12+3=9的解是X=多少
<gadget id="calculator">9 - 3</gadget>
<output>6</output>

<gadget id="calculator">12 + 6</gadget>
<output>18</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<result>9</result>