# How do you evaluate 2x - 4, if x = 3?

May 31, 2016

You have to replace $x$ with $3$.

#### Explanation:

where do you read $x$ you have to substitute the value $3$ remembering that the number in front of the $x$ is multiplying the $x$.

$2 x - 4$

I substitute where I read $x$ the $3$

$2 \cdot 3 - 4 = 6 - 4 = 2$.