Posted by Celina on Friday, November 14, 2008 at 5:49pm.
Here's another problem I'm having a little trouble with:
A piece of string is 40 cm long. It is cut into three pieces. The longest piece is 3 times as long as the middlesized piece, and the shortest piece is 23 cm shorter than the longest piece. Find the lengths of the three pieces.
What could be an equation I could write?
Thank you so much!

Algebra  Damon, Friday, November 14, 2008 at 6:31pm
call the middle size m
then the long piece is 3 m
and the short piece is 3m23
so
(3m23) + m + 3m = 40
7 m 23 = 40
solve for m

Algebra  Reiny, Friday, November 14, 2008 at 6:33pm
How about:
let the shortest piece be x cm
<the shortest piece is 23 cm shorter than the longest piece> or
the longest piece is 23 more than the shortest piece,
so longest = x+23
<The longest piece is 3 times as long as the middlesized piece> or
the middle piece is 1/3 of the longest piece,
so middle piece = 1/3(x+23)
then x + (x+23) + 1/3(x+23) = 40
(I get x=4, for the shortest piece of 4 cm)

Algebra  Celina, Friday, November 14, 2008 at 6:36pm
Thanks!

Algebra  Rachael, Sunday, November 30, 2008 at 3:36pm
whats the answer?
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