document.write( "Question 799730: a girl is half her mothers age. the mother is five years younger than her father. they have all have a total of 100 years combined. how old is the girl. \n" ); document.write( "
Algebra.Com's Answer #482771 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
a girl is half her mothers age. the mother is five years younger than her father. they have all have a total of 100 years combined. how old is the girl.
\n" ); document.write( "---------------------
\n" ); document.write( "Equations:
\n" ); document.write( "g = (1/2)m
\n" ); document.write( "m = f - 5
\n" ); document.write( "g + m + f = 100
\n" ); document.write( "------
\n" ); document.write( "Substitute for \"g\" and for \"f\" and solve for \"m\"::
\n" ); document.write( "(1/2)m + m + m+5 = 100
\n" ); document.write( "(5/2)m = 95
\n" ); document.write( "m = 38 (mother's age)
\n" ); document.write( "g = (1/2)m = 19 (daughter's age)
\n" ); document.write( "f = m+5 = 43 (father's age)
\n" ); document.write( "================================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "=======================
\n" ); document.write( "
\n" ); document.write( "
\n" );