document.write( "Question 517970: a student scored 71, 83, and 96 on three algebra tests. what must he score on the fourth test in order to have an average of at least 85? \n" ); document.write( "
Algebra.Com's Answer #345001 by rfer(16322)\"\" \"About 
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(71+83+96+x)/4=85\r
\n" ); document.write( "\n" ); document.write( "250+x=85*4
\n" ); document.write( "250+x=340
\n" ); document.write( "x=340-250
\n" ); document.write( "x=90
\n" ); document.write( "
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