document.write( "Question 1135261: Luke received grades of 88%, 72% and 82% on the three tests during the semester in a business course. If the final exam counts as two tests, what possible scores on the final exam will give him a final average of at least 80%? \n" ); document.write( "
Algebra.Com's Answer #752859 by rothauserc(4718)\"\" \"About 
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(88 +72 +82 +2x)/5 = 80
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\n" ); document.write( "multiply both sides of = by 5 and simplify
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\n" ); document.write( "242 +2x = 400
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\n" ); document.write( "2x = 158
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\n" ); document.write( "x = 79
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\n" ); document.write( "final exam score of 79 or greater will give a final average of at least 80%
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