SOLUTION: Find the dimensions of a rectangle with a perimeter of 90 cm if the length is 5 cm less than four times the width. width is 1 cm length is 2 cm.

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Question 280884: Find the dimensions of a rectangle with a perimeter of 90 cm if the length is 5 cm less than four times the width. width is 1 cm
length is 2 cm.

Answer by unlockmath(1688) About Me  (Show Source):
You can put this solution on YOUR website!
Hello,
Let's set up the width being x and the length being 4x-5. Now we can set up the equation to be: (note: It's a bit confusing when the problem states length is 2 cm and width is 1 cm. What is that about?)
2x+2(4x-5)=90 Combine like terms to get:
10x-10=90 Add 10 to both sides to get:
10x=100 Divide both sides by 10 to get:
x=10cm would be the width and the length is:
35cm
RJ
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