the perimeter of a rectangle is 50cm the length of the rectangle is 20 cm what is the width? i think it is 30 or 15

Question

anonymous · Answer

i think it is 30 or 15 because you know how a rectangle has 4 sides then if i divide 30 by 2=15 and how did i get 30 u ask? i simply did 50-20=30

ybarrap · Answer

Perimeter = 2x+2y=50
x+y=25
y=25-x
x=20
y= 25-20=5

jasmineflvs · Answer

i'll let someone else answer i know it but i don't have time to write it out

anonymous · Answer

so its 5?

ybarrap · Answer

|dw:1376676038991:dw|

anonymous · Answer

@ybarrap so 50 is total so equation is 
50-20=30 but 20/2=10 and 30/2=15

anonymous · Answer

|dw:1376676092886:dw|The equation is p = 21 + 2 w 
 50 =2 * l + 2 * w
        2*20 = 40 + 2*w
40/40      50/40    im pretty sure... I did the same thing with volume a minute ago......