document.write( "Question 51681: What is A=a+(n-1)d and it says to solve for n \n" ); document.write( "
Algebra.Com's Answer #34481 by AnlytcPhil(1810)\"\" \"About 
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What is A = a + (n - 1)d and it says \r\n" );
document.write( "to solve for n\r\n" );
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document.write( "This is a formula for the nth term, A, \r\n" );
document.write( "of an arithmetic sequence with first\r\n" );
document.write( "term a and common difference d.\r\n" );
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document.write( "To solve it for n:\r\n" );
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document.write( "         A = a + (n - 1)d\r\n" );
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document.write( "         A = a + d(n - 1)\r\n" );
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document.write( "         A = a + dn - d\r\n" );
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document.write( "A - a + d = dn\r\n" );
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document.write( "Divide both sides by d\r\n" );
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document.write( " A - a + d     dn\r\n" );
document.write( "----------- = ----\r\n" );
document.write( "     d         d\r\n" );
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document.write( "               1\r\n" );
document.write( " A - a + d     dn\r\n" );
document.write( "----------- = ----\r\n" );
document.write( "     d         d\r\n" );
document.write( "               1\r\n" );
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document.write( " A - a + d     \r\n" );
document.write( "----------- = n\r\n" );
document.write( "     d         \r\n" );
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document.write( "               A - a + d     \r\n" );
document.write( "          n = ----------- \r\n" );
document.write( "                   d  \r\n" );
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document.write( "Edwin
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