document.write( "Question 856835: The average age of my family consisting of parents and myself is 30 year. Ten year ago, the average age of my parents were 23year.Find my present age. \n" ); document.write( "
Algebra.Com's Answer #516314 by JulietG(1812)![]() ![]() You can put this solution on YOUR website! Let A be your age: \n" ); document.write( "A + B + C = 90 (3x30, the average age; there are 3 of you) \n" ); document.write( "(B-10)+(C-10)= 46 (23x2 people), Add 20 to each side, B+C=66 \n" ); document.write( "Substitute the known value of B+C from the second equation into the first equation. \n" ); document.write( "A + 66 = 90 \n" ); document.write( "Subtract \n" ); document.write( "A = 90- 66 = 24 \n" ); document.write( ". \n" ); document.write( "Check my math; I haven't had my coffee yet ;-)\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |