document.write( "Question 203513: Ricardo is 4 years less than twice as old as his sister. The sum of their ages is 20. How old is Ricardo? \n" ); document.write( "
Algebra.Com's Answer #153556 by rfer(16322)\"\" \"About 
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Let x=sister=8 yrs
\n" ); document.write( "let 2x-4=Ricardo =12 yrs
\n" ); document.write( "x+2x-4=20
\n" ); document.write( "3x=24
\n" ); document.write( "x=8
\n" ); document.write( "
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