Exercise29

A rectangular frame’s perimeter is \(6.8\) feet. If its length is \(2.3\) feet, suppose we want to find how long is its width. A rectangle’s perimeter formula is

\(\displaystyle{P=2(l+w)}\text{,}\)

where \(P\) stands for perimeter, \(l\) for length and \(w\) for width. We can solve this problem using the equation:

\(\displaystyle{6.8=2(2.3+w)}\text{.}\)

Check whether \(4.5\) is a solution for \(w\) of this equation.

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