document.write( "Question 919813: if triangle abc is isosceles, angle b is the vertex angle. ab=20x-2, bc=12x+30 and ac=25x, find perimeter of triangle abc \n" ); document.write( "
Algebra.Com's Answer #557981 by MathLover1(20849)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "if triangle abc is isosceles, angle \"b\" is the vertex angle, \"ab=20x-2\",\"+bc=12x%2B30\" and \"ac=25x\", find perimeter of triangle \"abc\"\r
\n" ); document.write( "\n" ); document.write( "Since the triangle is isosceles, \"ab=+bc\"}, so:\r
\n" ); document.write( "\n" ); document.write( "\"20x-2=12x%2B30\" solve for \"x\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"20x-12x=2%2B3\"\r
\n" ); document.write( "\n" ); document.write( "\"8x=5\"\r
\n" ); document.write( "\n" ); document.write( "\"x=5%2F8\"\r
\n" ); document.write( "\n" ); document.write( "then\r
\n" ); document.write( "\n" ); document.write( "\"ab=20x-2\"
\n" ); document.write( "=>\"ab=20%285%2F8%29-2\"
\n" ); document.write( "=>\"ab=5%285%2F2%29-4%2F2\"
\n" ); document.write( "=>\"ab=25%2F2-4%2F2+\"
\n" ); document.write( "=>\"ab=21%2F2\"
\n" ); document.write( "=>\"ab=10.5\"\r
\n" ); document.write( "\n" ); document.write( "\"bc=12x%2B30\"
\n" ); document.write( "=>\"bc=12%285%2F8%29%2B30\"
\n" ); document.write( "=> \"bc=3%2A5%2F2%2B60%2F2\"
\n" ); document.write( "=> \"bc=75%2F2\"
\n" ); document.write( "=> \"bc=37.5\"\r
\n" ); document.write( "\n" ); document.write( "and \r
\n" ); document.write( "\n" ); document.write( "\"ac=25x\"
\n" ); document.write( "=> \"ac=25%285%2F8%29\"
\n" ); document.write( "=> \"ac=125%2F8\"
\n" ); document.write( "=> \"ac=+15.625\"\r
\n" ); document.write( "\n" ); document.write( " perimeter of triangle \"abc\":
\n" ); document.write( "\"P=ab%2Bbc%2Bac\"\r
\n" ); document.write( "\n" ); document.write( "\"P=10.5%2B37.5%2B15.6\"\r
\n" ); document.write( "\n" ); document.write( "\"P=63.6\"\r
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