2x-28/2=4, the solution of this equation is x=how much
2x-28/2=4，这个方程的解是x=多少
<gadget id="calculator">28 / 2</gadget>
<output>14</output>

<gadget id="calculator">4 + 14</gadget>
<output>18</output>

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

<result>9</result>