x(1+0.3)*0.9-x=170, find x.
x(1+0.3)*0.9-x=170，求x．
<gadget id="calculator">0.9 * 0.3</gadget>
<output>0.27</output>

<gadget id="calculator">0.27 - 1</gadget>
<output>-0.73</output>

<gadget id="calculator">0.9 + (-0.73)</gadget>
<output>0.17</output>

<gadget id="calculator">170 / 0.17</gadget>
<output>1_000</output>

<result>1_000</result>