CPM Homework Help : ACC7 Problem 3-96

The length of a rectangle is three centimeters more than twice the width. The perimeter is $78$ centimeters. Define a variable and write and solve an equation to find out how long and how wide the rectangle is.

Hint:

Try making a table. See problems 3-6 and 3-41.

Help 1:

Remember that the perimeter is the sum of ALL the sides. Try writing an equation for this situation.

More Help 2:

$2\text{L}+2\text{W}=78\text{cm}$

More Help 3:

Remember that the length is three centimeters more than twice the width. That is, L $=3+2$ W.

Answer:

Length $=27$ cm
Width $=12$ cm

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