document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=880618>Question 880618</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Naomi had an average score of 70 on her science tests. On her next test, she got a 90 and her average jumped 5 points to 75. How many science tests has Naomi taken? </SPAN>\n" );
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document.write( "SOLUTION:<BR>\n" );
document.write( "let the No. be x<BR>\n" );
document.write( "(x - 1), then <BR>\n" );
document.write( "{70.(x - 1)   90}/x = 75<BR>\n" );
document.write( "therefore </SPAN>\n" );
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