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)![]() ![]() ![]() You can put this solution on YOUR website! 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( "--------------------- \n" ); document.write( "Equations: \n" ); document.write( "m + d = 56 \n" ); document.write( "(m+8) = 2(d+8) \n" ); document.write( "------------------ \n" ); document.write( "Substitute for \"m\" and solve for \"d\": \n" ); document.write( "(56-d+8) = 2d + 16 \n" ); document.write( "---- \n" ); document.write( "64 - d = 2d + 16 \n" ); document.write( "3d = 48 \n" ); document.write( "d = 16 (the daughter is 16 yrs old) \n" ); document.write( "========================================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "============= \n" ); document.write( " |