Solve the equation: (1/5)x+(3/7)=(3/7)x.
解方程：(1/5)x+(3/7)=(3/7)x．
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(3/7) - (1/5)</gadget>
<output>8/35 = around 0.228571</output>

<gadget id="calculator">(3/7) / (8/35)</gadget>
<output>15/8 = around 1.875</output>

<result>15/8 = around 1.875</result>