What is the solution of the equation 0.5x+2.8=9.3.
方程0.5x+2.8=9.3的解是多少．
<gadget id="calculator">9.3 - 2.8</gadget>
<output>6.5</output>

<gadget id="calculator">6.5 / 0.5</gadget>
<output>13</output>

<result>13</result>