document.write( "Question 720107: My mother is 12 years more than twice my age. After 8 years, my mother’s age will be 20 years less than three times my age. Find my age and my mother’s age. \n" ); document.write( "
Algebra.Com's Answer #441663 by god2012(113)![]() ![]() You can put this solution on YOUR website! Let 'm' be the age of mother and 'k' be the age of the kid.\r \n" ); document.write( "\n" ); document.write( "Given : m = 2k + 12 -------eq.1\r \n" ); document.write( "\n" ); document.write( "After 8 years , \n" ); document.write( "m' = m + 8 , k' = k +8 \n" ); document.write( "m' = 3k' - 20 = 3(k + 8) - 20 = 3k + 4 = m + 8\r \n" ); document.write( "\n" ); document.write( "m = 3k - 4 ------------eq.2\r \n" ); document.write( "\n" ); document.write( "put eq.2 in eq.1\r \n" ); document.write( "\n" ); document.write( "3k - 4 = 2k + 12 \n" ); document.write( "k = 16 \n" ); document.write( "m = 44 \n" ); document.write( " |