Solve the equation: 24: (x+3)=12:2.
解方程：24：(x+3)=12：2．
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">24 - 18</gadget>
<output>6</output>

<gadget id="calculator">6 / 6</gadget>
<output>1</output>

<result>1</result>