The perimeter of a rectangle is fifty centimeters. The length of the rectangle is twenty centimeters. What is the width of the rectangle?

Question

hartnn · Answer

Perimeter is just twice the sum of length and width
P =2 (L+W)
here, P = 50, L=20
just find W

nurali · Answer

W=x
L=x+9

P=L+W+L+W
50cm=(x+9cm)+(x)+(x+9cm)+(x)
50cm=4x+18cm
50cm-18cm=4x
32cm=4x
32cm/4=4x/4
8cm=x

So we know W=x, and L=x+9, we also know that the width is 8 cm so the length is 8+9, which is 17 cm

amistre64 · Answer

not real sure how Nuralis setup relates. But it seems to be the solution to a different question from: http://answers.yahoo.com/question/index?qid=20110307200029AAlZqae