document.write( "Question 903493: Suppose I am a grandmother. My granddaughter is about as old in days as my daughter is in weeks. She is also as many months old as I am in years. Together, the three of us are 140 years old. How old am I? \n" ); document.write( "
Algebra.Com's Answer #548097 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Suppose I am a grandmother. \n" ); document.write( "let a = grandma's age \n" ); document.write( "let d = daughter's age \n" ); document.write( "let g = granddaughter's age \n" ); document.write( " My granddaughter is about as old in days as my daughter is in weeks. \n" ); document.write( "365g = 52d \n" ); document.write( "divide both sides by 52 Approx \n" ); document.write( "7g = d\r \n" ); document.write( "\n" ); document.write( " She is also as many months old as I am in years. \n" ); document.write( "12g = a \n" ); document.write( " Together, the three of us are 140 years old. \n" ); document.write( "a + d + g = 140 \n" ); document.write( "replace d with 7g, replace a with 12g \n" ); document.write( "12g + 7g + g = 140 \n" ); document.write( "20g = 140 \n" ); document.write( "g = 140/20 \n" ); document.write( "g = 7 yrs old is the granddaughter \n" ); document.write( ": \n" ); document.write( "How old am I? \n" ); document.write( "a = 12(7) \n" ); document.write( "a = 84 yrs is grandma \n" ); document.write( " |