Solve the equation: ((x)/7)+(3/5)x=140.
解方程：((x)/7)+(3/5)x=140．
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(1/7) + (3/5)</gadget>
<output>26/35 = around 0.742857</output>

<gadget id="calculator">140 / (26/35)</gadget>
<output>2_450/13 = around 188.461538</output>

<result>2_450/13 = around 188.461538</result>