document.write( "Question 737981: The average age of rolfe and jam gives the age of kyle. 3 years ago, the sum of ages of rolfe, jam and kyle was 66. 5 years from now. kyle will be as old as jam now. What are their present ages?\r
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document.write( "Please solve this problem for my daughter.. thank you so much :D \n" );
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Algebra.Com's Answer #450679 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Write an equation for each statement: \n" ); document.write( ": \n" ); document.write( " \"The average age of rolfe and jam gives the age of kyle.\" \n" ); document.write( "k = \n" ); document.write( "mult both sides by 2 \n" ); document.write( "2k = r + j \n" ); document.write( ": \n" ); document.write( "\" 3 years ago, the sum of ages of rolfe, jam and kyle was 66.\" \n" ); document.write( "(r-3) + (j-3) + (k-3) = 66 \n" ); document.write( "r + j + k - 9 = 66 \n" ); document.write( "r + j + k = 66+9 \n" ); document.write( "r + j + k = 75 \n" ); document.write( "From the 1st statement, replace r + j with 2k \n" ); document.write( "2k + k = 75 \n" ); document.write( "3k = 75 \n" ); document.write( "k = 75/3 \n" ); document.write( "k = 25 yrs is Kyle's age \n" ); document.write( ": \n" ); document.write( "\" 5 years from now. kyle will be as old as jam now.\" \n" ); document.write( "k + 5 = j \n" ); document.write( "replace k with 25 \n" ); document.write( "25 + 5 = j \n" ); document.write( "j = 30 yrs is Jam's age \n" ); document.write( ": \n" ); document.write( "Find r's age using the 1st statement \n" ); document.write( "2k = r + j \n" ); document.write( "2(25) = r + 30 \n" ); document.write( "50 - 30 = r \n" ); document.write( "r = 20 yrs is Rolf's age \n" ); document.write( ": \n" ); document.write( " What are their present ages? we answered that. \n" ); document.write( " |