document.write( "Question 658387: Dayna is 8 and her mother is 31. How long will it be before her mother is twice as old as she is?
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Algebra.Com's Answer #410265 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Dayna is 8 and her mother is 31. How long will it be before her mother is twice as old as she is? \n" ); document.write( "------ \n" ); document.write( "Equations: \n" ); document.write( "d = 8 \n" ); document.write( "m = 31 \n" ); document.write( "---- \n" ); document.write( "Let the \"how long\" be x: \n" ); document.write( "m + x = 2(d+x) \n" ); document.write( "31 + x = 2(8+x) \n" ); document.write( "31 + x = 16 + 2x \n" ); document.write( "x = 15 (# of years required) \n" ); document.write( "------------------ \n" ); document.write( "Dayna will be 8+15 = 23 \n" ); document.write( "Mother will be 31 + 15 = 46 \n" ); document.write( "------------------------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |