I don't think anyone can solve this without seeing the table mentioned in the question :)
Hello,
g_m(15,1215)=√(5*1215)=9√15≈77,942286340....
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The scale faction is 20 to 1 hope that helps
First we have to isolate the varible
-2/5x-2=18
+2 +2
-2/5x=20
then divide both sides by -2/5 to get x completely by itself
-2/5x=20
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-2/5 -2/5
x=-50
i hope i've helped!
