document.write( "Question 1095461: This year, serena is one-seventh of her cousin's age. Two years from now, serena will be one-fourth of her cousein's age. In how many years will serena be half her cousin's age? \n" ); document.write( "
Algebra.Com's Answer #709980 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! This year, serena is one-seventh of her cousin's age. Two years from now, serena will be one-fourth of her cousein's age. In how many years will serena be half her cousin's age? \n" ); document.write( "----------- \n" ); document.write( "S = C/7 \n" ); document.write( "S+2 = (C+2)/4 \n" ); document.write( "Find their ages. \n" ); document.write( "Sub for S in the 2nd eqn: \n" ); document.write( "C/7 + 2 = (C+2)/4 \n" ); document.write( "4C + 56 = 7(C+2) = 7C+14 \n" ); document.write( "C = 14 \n" ); document.write( "S = 2 \n" ); document.write( "=============== \n" ); document.write( "Difference = 12 years. \n" ); document.write( "--> 1/2 at ages 12 & 24 \n" ); document.write( "---- \n" ); document.write( "In how many years will serena be half her cousin's age? \n" ); document.write( "In 10 years. \n" ); document.write( " |