document.write( "Question 1092380: A finite arithmetic sequence has 12 terms. The last term is 100 and the common difference is 3.What is the firt term
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Algebra.Com's Answer #706980 by Boreal(15235)\"\" \"About 
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a12=a1+d(n-1); a12 is 100, d=3, n=12
\n" ); document.write( "100=a1+3(11)
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\n" ); document.write( "a1=67
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