# How do you solve for x in 4+x=k?

Nov 21, 2016

$x = k - 4$

#### Explanation:

In this type of equation called a $\textcolor{b l u e}{\text{literal equation}}$ since it has a combination of numbers and letters, we treat the k as a numeric value.

To isolate x on the left of the equation, subtract 4 from both sides.

$\cancel{4} \cancel{- 4} + x = k - 4$

$\Rightarrow x = k - 4 \text{ is the solution}$