document.write( "Question 491647: The sum of Mrs. Black's age and her daughter's age is 56 years. In 8 years, Mrs. Black will be twice as old as her daughter. How old is her daughter now? \n" ); document.write( "
Algebra.Com's Answer #334712 by stanbon(75887)\"\" \"About 
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The sum of Mrs. Black's age and her daughter's age is 56 years. In 8 years, Mrs. Black will be twice as old as her daughter. How old is her daughter now?
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\n" ); document.write( "Equations:
\n" ); document.write( "m + d = 56
\n" ); document.write( "(m+8) = 2(d+8)
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\n" ); document.write( "Substitute for \"m\" and solve for \"d\":
\n" ); document.write( "(56-d+8) = 2d + 16
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\n" ); document.write( "64 - d = 2d + 16
\n" ); document.write( "3d = 48
\n" ); document.write( "d = 16 (the daughter is 16 yrs old)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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