Solve the equation: 1.9x-1.7x=80.3.
解方程：1.9x-1.7x=80.3．
<gadget id="calculator">1.9 - 1.7</gadget>
<output>0.2</output>

<gadget id="calculator">80.3 / 0.2</gadget>
<output>401.5</output>

<result>401.5</result>