document.write( "Question 1007374: what is the length of AB in a triangle equation is x+4+x+x+5=21 then find AB x+4= \n" ); document.write( "

Algebra.Com's Answer #627775 by ikleyn(52803) $\"\"$ $\"About$

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\n" ); document.write( "what is the length of AB in a triangle equation is x+4+x+x+5=21 then find AB x+4=
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document.write( "If the original equation is x+4+x+x+5=21, then it is equivalent to\r\n" );
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document.write( "3x + 9 = 21,\r\n" );
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document.write( "3x = 21 - 9,\r\n" );
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document.write( "3x = 12,\r\n" );
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document.write( "and has the solution x =  = 4.\r\n" );
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document.write( "Then AB = x + 4 = 4 + 4 = 8.\r\n" );
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