a thick subsurface layer of soil that remains frozen throughout the year, occurring chiefly in polar regions.
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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The Andes have formed as a result of a subduction zone while the Himalayas have formed as a result of a convergent plate boundary.