document.write( "Question 1158290: There are 3n-1 square tiles in the nth figure.
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Algebra.Com's Answer #781204 by ikleyn(52802) $\"\"$ $\"About$

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document.write( "    3n - 1 = 509\r\n" );
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document.write( "    3n     = 509 + 1 = 510\r\n" );
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document.write( "     n               = 510/3 = 170.    ANSWER\r\n" );
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