Solve the equation: ((x)/(3.5))=((x-16)/(1.5)).
解方程：((x)/(3.5))=((x-16)/(1.5))．
<gadget id="calculator">16 * 3.5</gadget>
<output>56</output>

<gadget id="calculator">3.5 - 1.5</gadget>
<output>2</output>

<gadget id="calculator">56 / 2</gadget>
<output>28</output>

<result>28</result>