SOLUTION: A rectangle has sides of 3x – 4 and 7x + 10. Find the expression that represents its perimeter.

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Question 113075: A rectangle has sides of 3x – 4 and 7x + 10. Find the expression that represents its perimeter.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
:
You know the perimeter = 2L + 2W
Therefore
P = 2(3x – 4) + 2(7x + 10)
:
Multiply what's inside the brackets
P = 6x - 8 + 14x + 20
:
Combine like terms:
P = 6x + 14x - 8 + 20
:
P = 20x + 12