# How do you evaluate w(8-y) if w=6, x=0.4, y=1/2, z=-3?

Jun 3, 2017

See a solution process below:

#### Explanation:

First, the $x$ and $z$ terms are not used in the expression so are extraneous to this problem

To evaluate the expression as required in the problem substitute $\textcolor{red}{6}$ for $\textcolor{red}{w}$ and substitute $\textcolor{b l u e}{\frac{1}{2}}$ for $\textcolor{b l u e}{y}$ and then calculate the result:

$\textcolor{red}{w} \left(8 - \textcolor{b l u e}{y}\right)$ becomes:

$\textcolor{red}{6} \left(8 - \textcolor{b l u e}{\frac{1}{2}}\right) \implies$

$\left(\textcolor{red}{6} \cdot 8\right) - \left(\textcolor{red}{6} \cdot \textcolor{b l u e}{\frac{1}{2}}\right) \implies$

$48 - 3 \implies$

$45$