document.write( "Question 56720: Jon's final exam was given 5 times the weight of a weekly test. The average of 15 weekly tests was 87. The overall weighted average was 85. What grade did he make on the final? \n" ); document.write( "
Algebra.Com's Answer #38497 by stanbon(75887)\"\" \"About 
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Let the score on the final be \"x\".
\n" ); document.write( "Then:
\n" ); document.write( "[15*87+5x]/20=85
\n" ); document.write( "[1305+5x]=1700
\n" ); document.write( "5x=395
\n" ); document.write( "x=79
\n" ); document.write( "His score on the final was 79
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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