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|dw:1348709556519:dw|

|dw:1348710092420:dw|

Add all the sides and set it equal to 78

how do i get the length

Did you find w, the width?

i got 25 for the width

How did you get that?

i added the sides like said

3w+3+w=78

is that wrong

|dw:1348710695880:dw|

You must add ALL FOUR sides to get the perimeter.

how do i fond the length

find

Look at the picture. The width is w and the length is 3w + 3

so i just plug in the width and i get my answer

What is w?

What is 3w?

do u mean 3*9 or 3w more than the width

3w means 3 times w so if w is 9 then 3w means 3 times 9 which is 27. So 3w = 27.
Now what is 3w + 3?

30

So what is the length of the rectangle?

w is 9 and the length is 30

Good job!!

Does that make the perimeter 78?