Solve the equation: (11/15)-(3/5)x=(4/15).
解方程：(11/15)-(3/5)x=(4/15)．
<gadget id="calculator">11 / 15</gadget>
<output>11/15 = around 0.733333</output>

<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(11/15) - (4/15)</gadget>
<output>7/15 = around 0.466667</output>

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

<gadget id="calculator">(7/15) / (3/5)</gadget>
<output>7/9 = around 0.777778</output>

<result>7/9 = around 0.777778</result>