###### 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.

• Yes

• No

in-context