SOLUTION: If the perimeter of a rectangle is 26 ft and the width is 10 ft find its length?

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Question 118024: If the perimeter of a rectangle is 26 ft and the width is 10 ft find its length?
Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!
Start with the perimeter formula


Plug in P=26 and W=10


Multiply


Subtract 26 from both sides


Subtract 2l from both sides


Combine like terms on the right side


Divide both sides by -2 to isolate l



Divide

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Answer:
So our answer is


When the length is 3 and the width is 10, the perimeter is 26


Check:

Start with the perimeter formula


Plug in P=26, L=3, and W=10


Multiply


Add. Since the two sides of the equation are equal, this verifies our answer.

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