document.write( "Question 39764: Sum of angie and her mother is 64 years. In 8 years angie will be (3/5) as old as her mother at that time. what are the present ages of angie and her mother? \n" ); document.write( "
Algebra.Com's Answer #25181 by vidhyak(98)![]() ![]() ![]() You can put this solution on YOUR website! Let Angie's age be A and her mother's age be M\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Sum of angie and her mother is 64 years\r \n" ); document.write( "\n" ); document.write( "A + M = 64 ------eq 1\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "In 8 years angie will be (3/5) as old as her mother at that time. \r \n" ); document.write( "\n" ); document.write( "(A + 8) = (3/5)(M + 8)\r \n" ); document.write( "\n" ); document.write( "5(A + 8) = 3(M + 8 ) \n" ); document.write( "5A + 40 = 3M + 24 \n" ); document.write( "5A - 3M = 24 - 40 \n" ); document.write( "5A - 3M = -16 ------ eq 2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Multiple eq1 by 3 and add with eq 2 \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "3A + 3M = 192 \n" ); document.write( "5A - 3M = -16 \n" ); document.write( "------------------------------- \n" ); document.write( "8A = 176\r \n" ); document.write( "\n" ); document.write( "A = 176/8 = 22\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Substitute A = 22 in eq1\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "A + M = 64 \n" ); document.write( "22 + M = 64 \n" ); document.write( "M = 64 - 22 \n" ); document.write( "M = 42\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Angie's age is 22 and her mother's age is 42 \n" ); document.write( " |