document.write( "Question 675664: in a quadrilateral ABCD A=[3x+5],B=[3x-10],C=[x+25]and D=[2x-15] find the angle of the quadrilateral. \n" ); document.write( "
Algebra.Com's Answer #419989 by MathLover1(20850)\"\" \"About 
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the sum of all angles in a quadrilateral \"ABCD\" is \"360\" degrees\r
\n" ); document.write( "\n" ); document.write( "so, \"A%2BB%2BC%2BD=360\" \r
\n" ); document.write( "\n" ); document.write( "\"%283x%2B5%29%2B%283x-10%29%2B%28x%2B25%29%2B%282x-15%29=360\" \r
\n" ); document.write( "\n" ); document.write( "\"3x%2B5%2B3x-10%2Bx%2B25%2B2x-15=360\" \r
\n" ); document.write( "\n" ); document.write( "\"9x%2B5=360\" \r
\n" ); document.write( "\n" ); document.write( "\"9x=360-5\"\r
\n" ); document.write( "\n" ); document.write( "\"9x=355\"\r
\n" ); document.write( "\n" ); document.write( "\"x=355%2F9\"\r
\n" ); document.write( "\n" ); document.write( "\"x=39.444\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"A=3x%2B5\"\r
\n" ); document.write( "\n" ); document.write( "\"A=3%2A39.44%2B5\"\r
\n" ); document.write( "\n" ); document.write( "\"A=118.32%2B5\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28A=123.332%29\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"B=3x-10\"\r
\n" ); document.write( "\n" ); document.write( "\"B=118.332-10\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28B=108.332%29\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"C=x%2B25\"\r
\n" ); document.write( "\n" ); document.write( "\"C=39.444%2B25\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28C=64.444%29\"\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"D=2x-15\"\r
\n" ); document.write( "\n" ); document.write( "\"D=2%2A39.444-15\"\r
\n" ); document.write( "\n" ); document.write( "\"D=78.888-15\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28D=63.888%29\"
\n" ); document.write( "
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