document.write( "Question 1162919: the sum of the first four terms of a linear sequence(A.P)is 26 and that of
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\n" ); document.write( "(¡) the first term;
\n" ); document.write( "(¡¡) the common difference. \n" ); document.write( "
Algebra.Com's Answer #786828 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
the sum of the first four terms of a linear sequence(A.P)is 26 and that of
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\n" ); document.write( "(¡) the first term;
\n" ); document.write( "(¡¡) the common difference.
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document.write( "\"%221.%22\"\"a%5B1%5D%2B%28a%5B1%5D%2Bd%29%2B%28a%5B1%5D%2B2d%29%2B%28a%5B1%5D%2B3d%29=26\"\r\n" );
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document.write( "\"%222.%22\"\"4a%5B1%5D%2B6d=26\"\r\n" );
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document.write( "\"%223.%22\"\"2a%5B1%5D%2B3d=13\"\r\n" );
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document.write( "\"%224.%22\"\"%28a%5B1%5D%2B4d%29%2B%28a%5B1%5D%2B5d%29%2B%28a%5B1%5D%2B6d%29%2B%28a%5B1%5D%2B7d%29=74\"\r\n" );
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document.write( "\"%225.%22\"\"4a%5B1%5D%2B22d=74\"\r\n" );
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document.write( "\"%225.%22\"\"2a%5B1%5D%2B11d=37\"\r\n" );
document.write( "From 3 and 6, we have\r\n" );
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document.write( "\"system%282a%5B1%5D%2B3d=13%2C+2a%5B1%5D%2B11d=37%29\"\r\n" );
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document.write( "Solve that system for first term a1 and common difference d.\r\n" );
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document.write( "Edwin
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