<PRE><B>Question 245656</B>
Hello, 
We can set this up with the x being the width and x+7 being the length. Now we can set up an equation as:
x+x+(x+7)+(x+7)=54 Combine like terms will give us:
4x+14=54 Subtract 14 from both sides. 
4x=40  divide both sides by 4.
x=10 
So the width is 10 cm and length is 17 cm. 
Add the sides equals 54 cm
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RJ Toftness</PRE>