document.write( "Question 981990: Kathryn is 8 years older than her sister Rosemary. Eight years ago Kathryn was 3 times as old as Rosemary. How old is each now?
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Algebra.Com's Answer #602925 by macston(5194)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( "R=Rosemary's age; K=Kathryn's age=R+8yrs \n" ); document.write( ". \n" ); document.write( "K-8yrs=3(R-8yrs) Substitute for K \n" ); document.write( "(R+8yrs)-8yrs=3(R-8yrs) \n" ); document.write( "R=3R-24yrs \n" ); document.write( "-2R=-24yrs \n" ); document.write( "R=12 yrs ANSWER 1: Rosemary is 12 years old. \n" ); document.write( "K=R+8yrs=12yrs+8yrs=20 yrs ANSWER 2: Kathryn is 20 years old. \n" ); document.write( ". \n" ); document.write( "CHECK: \n" ); document.write( "K-8yrs=3(R-8yrs) \n" ); document.write( "20yrs-8yrs=3(12yrs-8yrs) \n" ); document.write( "12yrs=3(4yrs) \n" ); document.write( "12yrs=12yrs \n" ); document.write( " |