document.write( "Question 263806: what is the answer to (x+21)+(2x+9)=90 \n" ); document.write( "
Algebra.Com's Answer #194368 by mananth(16946)\"\" \"About 
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what is the answer to (x+21)+(2x+9)=90\r
\n" ); document.write( "\n" ); document.write( "x+21 +2x +9 =90\r
\n" ); document.write( "\n" ); document.write( "3x= 90 - 9-21\r
\n" ); document.write( "\n" ); document.write( "3x=60\r
\n" ); document.write( "\n" ); document.write( "x=60/3\r
\n" ); document.write( "\n" ); document.write( "x=20\r
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