Solve the equation: 5x-2,0.2x-0.1)=0.8.
解方程：5x-2,0.2x-0.1)=0.8．
<gadget id="calculator">0.8 - 0.2</gadget>
<output>0.6</output>

<gadget id="calculator">0.6 / 4.6</gadget>
<output>0.130435</output>

<result>0.130435</result>