Find the unknown x. 2x/5=15．
求未知数x．2x/5=15．
<gadget id="calculator">15 * 5</gadget>
<output>75</output>

<gadget id="calculator">75 / 2</gadget>
<output>75/2 = around 37.5</output>

<result>75/2 = around 37.5</result>