Solve the equation: (3/8)+2x=(2/5).
解方程：(3/8)+2x=(2/5)．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(2/5) - (3/8)</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">(1/40) / 2</gadget>
<output>1/80 = around 0.0125</output>

<result>1/80 = around 0.0125</result>