I would love to answer your question. However I cannot because I can not see any of your given options. Can you be more specific?
I think the answer is B. Hope this helps.
1. -18-6x=6+18x
-18-6=18x+6x
24x=-24
x=-1
2.8x-6-8=4+2x
8x-2x=18
6x=18
x=3
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Well, knowing geography will help you avoid earthquake, tornado and volcano areas.
Geography also helps you find good areas for oil or if your a mineral hunter.