Solve the equation: 54.8-3x=32.9, then x=how much.
解方程：54.8-3x=32.9，则x=多少．
<gadget id="calculator">54.8 - 32.9</gadget>
<output>21.9</output>

<gadget id="calculator">21.9 / 3</gadget>
<output>7.3</output>

<result>7.3</result>