document.write( "Question 991692: Julie is z years old, her father is 4 times as old as Julie, while her mother is 7 years younger than her father.
\n" ); document.write( "A) Write an expression for Julies fathers age.
\n" ); document.write( "B) Write an expression for Julies mothers age.
\n" ); document.write( "C) Their 3 ages add up to 101. Write an expression for their total ages and find Julie's age. \n" ); document.write( "
Algebra.Com's Answer #611516 by ankor@dixie-net.com(22740)\"\" \"About 
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Julie is z years old, her father is 4 times as old as Julie, while her mother is 7 years younger than her father.
\n" ); document.write( "A) Write an expression for Julies fathers age.
\n" ); document.write( "f = 4z
\n" ); document.write( "B) Write an expression for Julies mothers age.
\n" ); document.write( "m = f - 7
\n" ); document.write( "C) Their 3 ages add up to 101
\n" ); document.write( " Write an expression for their total ages
\n" ); document.write( "z + f + m = 101
\n" ); document.write( ":
\n" ); document.write( "find Julie's age.
\n" ); document.write( "Rewrite the 1st equation
\n" ); document.write( "4z = f
\n" ); document.write( "z = \"1%2F4\"f
\n" ); document.write( "or
\n" ); document.write( "z = .25f
\n" ); document.write( ":
\n" ); document.write( "In the total age equation, replace z and m
\n" ); document.write( ".25f + f + (f-7) = 101
\n" ); document.write( "2.25f = 101 + 7
\n" ); document.write( "2.25f = 108
\n" ); document.write( "f = 108/2.25
\n" ); document.write( "f = 48 yrs is fathers age
\n" ); document.write( "\"find Julie's age. \"
\n" ); document.write( "z = .25(48)
\n" ); document.write( "z = 12 yrs is Julie's age
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check this out, find mom's age: 48 - 7 = 41
\n" ); document.write( "Total ages
\n" ); document.write( "12 + 48 + 41 = 101\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );