document.write( "Question 1084810: Find the first term and the common difference of an arithmetic sequence if its 5th term is 33 and the 20th is 123
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Algebra.Com's Answer #698864 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "\"a%5Bn%5D=a%5B1%5D%2B%28n-1%29d\"\r\n" );
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\n" ); document.write( "its 5th term is 33
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document.write( "\"a%5B5%5D=a%5B1%5D%2B%285-1%29d\"\r\n" );
document.write( "\"33=a%5B1%5D%2B4d\"\r\n" );
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\n" ); document.write( "the 20th term is 123
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document.write( "\"a%5B20%5D=a%5B1%5D%2B%2820-1%29d\"\r\n" );
document.write( "\"123=a%5B1%5D%2B19d\"\r\n" );
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document.write( "Solve the system:\r\n" );
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document.write( "\"system%28a%5B1%5D%2B4d=33%2Ca%5B1%5D%2B19d=123%29\"\r\n" );
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document.write( "a1 will be the first term and d will be\r\n" );
document.write( "the common difference.  You finish.\r\n" );
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document.write( "Edwin
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