<PRE><B>Question 107746</B>
Perimeter(p) of a rectangle=2*Length(l) + 2*Width(w)or p=2l+2w
Let w=width

Then length(l)=2*w-10

p=2(2w-10)+2w=400  get rid of parens (distributive law)

400=4w-20+2w  add 20 to both sides
400+20=4w-20+20+2w  collect like terms

420=6w  divide both sides by 6

w=70 meters------------------------width
2w-10=2*70-10=140-10=130 meters -------length

CK

400=2*70+2*130
400=140+260
400=400

Hope this helps---ptaylor</PRE>