Question 399935
If the width is x
Then the length is (x+3) (because the length is to be 3m longer than the width)
FORMULA: The perimeter of the rectangular is {{{P=2*(L+W)}}}
L - the length
W - the width
So perimeter of the rectangular is 2*(x+(x+3))
From Problem perimeter is 26 m
So we have equation:
 {{{2*(x+(x+3))=26}}}
 {{{x+x+3=26/2}}}
 {{{2x=13-3}}}
 {{{2x=10}}}
{{{x=10/2}}}
{{{x=5}}}
the width of the rectangular backyard is 5m
Then the length is (x+3)=5+3=8m
Answer 5m and 8m