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my grade is a 92.3% and my final counts as only 10% so is the equation ...
(92.3*.9)+(.1*D)=89.50
83.07+(.1*D)=89.50
-83.07 -83.07
__________________
(.1*D)=6.43
so now i divide by .1 so I'm just gonna move the . place over one
so do i need a 64.3% on my final ?????
KEY
D = desired grade for final
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