document.write( "Question 1148414: Given: AB≅BC ; CD≅BC ;
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Algebra.Com's Answer #769768 by ikleyn(52804) $\"\"$ $\"About$

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document.write( "     AB≅BC and CD≅BC   implies   AB≅CD.\r\n" );
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document.write( "It means\r\n" );
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document.write( "    2x+1 = 4x-11.\r\n" );
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document.write( "It implies\r\n" );
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document.write( "    1 + 11 = 4x - 2x\r\n" );
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document.write( "    12     = 2x\r\n" );
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document.write( "     x     = 12/2 = 6.\r\n" );
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document.write( "PROVED\r\n" );
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