(3/5) plus (2/5) of a number is equal to 8, find this number.
一个数的(3/5)加上(2/5)等于8，求这个数．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">8 - (2/5)</gadget>
<output>38/5 = around 7.6</output>

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

<gadget id="calculator">(38/5) / (3/5)</gadget>
<output>38/3 = around 12.666667</output>

<result>38/3 = around 12.666667</result>