###### Exercise54

A rectangular frame’s perimeter is $$7$$ feet. If its length is $$2.1$$ feet, suppose we want to find how long is its width. A rectangle’s perimeter formula is

\begin{equation*} P=2(l+w) \end{equation*}

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

\begin{equation*} 7=2(2.1+w) \end{equation*}

Check whether $$1.4$$ is a solution for $$w$$ of this equation.

• Yes

• No

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