Solve the equation: (1-(4/9))x=(3/5).
解方程：(1-(4/9))x=(3/5)．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">1 - (4/9)</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">(3/5) / (5/9)</gadget>
<output>27/25 = around 1.08</output>

<result>27/25 = around 1.08</result>