I'm not exactly sure what you are trying to ask..
However, here is my take on your problem.
36 = Total before the day
8 = Total at the end of the day
36 - 8 = 28 <em>This is how many packages were left.
</em>36 = 28 + 8 <u /><em>This is a possible equation, it contains two terms (28, 8).
</em>36-8=28 <em>This is another possible equation that is equvilent to the previous suggested one.</em><em>
</em>Hope this helps!<em>
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La unidad en que suele medirse la altura sobre el nivel del mar es el metro<span>. Se habla pues de </span>metros sobre el nivel del mar.
Because the website may be speaking from before Hong Kong belonged to China