A string of length 40 metres is divided into three parts of different lengths. The first part is three times the second part, and the last part is 23 metres smaller than the first part.
Find the length of the largest part.  Choose one.
A) 27 B) 4 C) 5 D) 9 E) 8
Explanation :   Let the 2nd piece length be x.   1st piece length is 3x.   3rd piece length is 3x – 23.   Sum of all the pieces is 40.   3x + x + 3x – 23 = 40.   7x = 63.   x = 9.   Lengths of the pieces are 27, 9, 4.   27nswer : 27
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A string of length 40 metres is divided into three parts of different lengths. The first part is three times the second part, and the last part is 23 metres smaller than the first part.
Find the length of the largest part.