document.write( "Question 452499: A is twice as old as B; ten years ago he was four times as old.what are their present ages? \n" ); document.write( "
Algebra.Com's Answer #312194 by richwmiller(17219)\"\" \"About 
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a-10=4*(b-10)
\n" ); document.write( "a=2b
\n" ); document.write( "2b-10=4b-40
\n" ); document.write( "30=2b
\n" ); document.write( "15=b
\n" ); document.write( "a=30
\n" ); document.write( "check
\n" ); document.write( "20=4*5
\n" ); document.write( "ok
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