document.write( "Question 696512: The sum of ages of mother and her daughter is 50 years.After 20 years mothers age will be twice as that of a daughters age.Find their present ages \n" ); document.write( "
Algebra.Com's Answer #429132 by ankor@dixie-net.com(22740)\"\" \"About 
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The sum of ages of mother and her daughter is 50 years.
\n" ); document.write( "After 20 years, mothers age will be twice as that of a daughters age.
\n" ); document.write( "Find their present ages.
\n" ); document.write( ":
\n" ); document.write( "let m = Mom's present age
\n" ); document.write( "let d = daughter's
\n" ); document.write( ":
\n" ); document.write( "Write an equation for each statement:
\n" ); document.write( ":
\n" ); document.write( "\"The sum of ages of mother and her daughter is 50 years.\"
\n" ); document.write( "m + d = 50
\n" ); document.write( ":
\n" ); document.write( "\"After 20 years mothers age will be twice as that of a daughters age.\"
\n" ); document.write( "m + 20 = 2(d + 20)
\n" ); document.write( "m + 20 = 2d + 40
\n" ); document.write( "m - 2d = 40 - 20
\n" ); document.write( "m - 2d = 20
\n" ); document.write( ":
\n" ); document.write( "Use elimination on these two equations
\n" ); document.write( "m + d = 50
\n" ); document.write( "m -2d = 20
\n" ); document.write( "---------------subtraction eliminates m, find d
\n" ); document.write( "3d = 30
\n" ); document.write( "d = 10 yrs is the daughter
\n" ); document.write( ":
\n" ); document.write( "I'll let you find Mom's age, check the solution in the last statement \n" ); document.write( "
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