document.write( "Question 238587: he is 21 years old\r
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Algebra.Com's Answer #175351 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! X-10= age of eric 10 years ago \n" ); document.write( "Eric is now 3 times as old as he was 10 years ago: 3(X-10) \n" ); document.write( "X is his age now\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "3(X-10)=X \n" ); document.write( "3X-30=X \n" ); document.write( "2X=30 \n" ); document.write( "X=15 \n" ); document.write( " |