Solve the equation: (x+320)*80%=x-128.
解方程：(x+320)*80%=x-128．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">320 * (4/5)</gadget>
<output>256</output>

<gadget id="calculator">256 + 128</gadget>
<output>384</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">384 / (1/5)</gadget>
<output>1_920</output>

<result>1_920</result>