When x=7, find the value of 4.8x-2.5x+8.
当x=7时，求4.8x-2.5x+8的值．
<gadget id="calculator">2.3 * 7</gadget>
<output>16.1</output>

<gadget id="calculator">16.1 + 8</gadget>
<output>24.1</output>

<result>24.1</result>