document.write( "Question 94621: Plese help:
\n" ); document.write( "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( "4-2x=20
\n" ); document.write( "-4 -4
\n" ); document.write( "________
\n" ); document.write( "2x = 16
\n" ); document.write( "2 2
\n" ); document.write( "x=8
\n" ); document.write( "This is what I got. Is it correct?
\n" ); document.write( "

Algebra.Com's Answer #68924 by ptaylor(2198)\"\" \"About 
You can put this solution on YOUR website!
WHAT IS x?????
\n" ); document.write( "YOU SURE ARE ON THE RIGHT TRACK!!! I HAVE FOUND THAT LAYING OUT THESE WORD PROBLEMS AS I HAVE DONE BELOW MAKES THEM A LOT EASIER TO SOLVE BECAUSE YOU CAN ALWAYS SEE WHERE YOU ARE AND WHERE YOU ARE GOING. \r
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\n" ); document.write( "\n" ); document.write( "Let x=Ricardo's Sister's age
\n" ); document.write( "Then 2x-4=Ricardo's age (we are told this)\r
\n" ); document.write( "\n" ); document.write( "Now we are also told that the sum of their ages is 20. So:\r
\n" ); document.write( "\n" ); document.write( "x+2x-4=20 add 4 to both sides\r
\n" ); document.write( "\n" ); document.write( "x+2x-4+4=20+4 collect like terms\r
\n" ); document.write( "\n" ); document.write( "3x=24 divide both sides by 3
\n" ); document.write( "x=8---------------------------------Ricardo's sister's age\r
\n" ); document.write( "\n" ); document.write( "2x-4=2*8-4=12 ------------------------Ricardo's age\r
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\n" ); document.write( "\n" ); document.write( "CK\r
\n" ); document.write( "\n" ); document.write( "12+8=20
\n" ); document.write( "20=20\r
\n" ); document.write( "\n" ); document.write( "Also: 12 is 4 less than 2 times 8\r
\n" ); document.write( "\n" ); document.write( "Hope this helps---ptaylor
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