Solve the equation: 2x-30%x=1.9+(5/3)/(1/6), x=how much.
解方程：2x-30%x=1.9+(5/3)/(1/6)，x=多少．
<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(5/3) / (1/6)</gadget>
<output>10</output>

<gadget id="calculator">1.9 + 10</gadget>
<output>11.9</output>

<gadget id="calculator">11.9 / 1.7</gadget>
<output>7</output>

<result>7</result>