Solve the equation: 2x-(3/4)x/(4/5)=510.
解方程：2x-(3/4)x/(4/5)=510．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">510 * (4/5)</gadget>
<output>408</output>

<gadget id="calculator">2 * (4/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(8/5) - (3/4)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">408 / (17/20)</gadget>
<output>480</output>

<result>480</result>