document.write( "Question 662807: hi......can you please help me how to solve this problem.? \"Steve is twice as old as Sylvie. Sylvie is three years older than Jacob. 4 years ago, Sylvie was twice Jacob's age. How old is Sylvie?\"... I really tried to solve this for so many times but still i can't get the correct answer..please help me. \n" ); document.write( "
Algebra.Com's Answer #412489 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Let t = Steve's present age \n" ); document.write( "Let s = Sylvie's present age \n" ); document.write( "Let j = Jacob's present age \n" ); document.write( ": \n" ); document.write( "Write an equation for each statement: \n" ); document.write( ": \n" ); document.write( "Steve is twice as old as Sylvie. \n" ); document.write( "t = 2s \n" ); document.write( ": \n" ); document.write( "Sylvie is three years older than Jacob. \n" ); document.write( "s = j + 3 \n" ); document.write( ": \n" ); document.write( "4 years ago, Sylvie was twice Jacob's age. \n" ); document.write( "s - 4 = 2(j - 4) \n" ); document.write( "s - 4 = 2j - 8 \n" ); document.write( "s = 2j - 8 + 4 \n" ); document.write( "s = 2j - 4 \n" ); document.write( "Replace s with (j+3), from the 2nd statement. \n" ); document.write( "j + 3 = 2j - 4 \n" ); document.write( "3 + 4 = 2j - j \n" ); document.write( "7 = j \n" ); document.write( ": \n" ); document.write( "Jacob is 7 yrs old \n" ); document.write( ": \n" ); document.write( "How old is Sylvie? \n" ); document.write( "s = j + 3 \n" ); document.write( "s = 7 + 3 \n" ); document.write( "s = 10 yrs old is Sylvie \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "Confirm this in the statement: \n" ); document.write( "\"4 years ago, Sylvie was twice Jacob's age.\" \n" ); document.write( "10 - 4 = 2(7 - 4) \n" ); document.write( "6 = 2(3) \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "Poor Steve seems to have been totally left out, but he is 20 yrs old \n" ); document.write( " |