# Evaluate 8x - 4y when x = 2 and y = 3.

## Question:

Evaluate

{eq}8x - 4y {/eq}

when {eq}x = 2 {/eq} and {eq}y = 3 {/eq}.

## An Expression at Given Values:

To evaluate an expression in one or more variables at given values, we just substitute the values of the variables in the given expression and simplify the result.

The given expression is: {eq}8x-4y {/eq}.

Substitute the values {eq}x=2 {/eq} and {eq}y=3 {/eq} in the above expression:

\begin{align} 8x-4y & = 8(2) - 4(3) \\ &= 16 -12 \\ &= \boxed{\mathbf{4}} \end{align}