How do you solve 18-4v=42?

Jan 20, 2017

$4 v = 18 - 42 = - 24$ $v = - 6$

Jan 20, 2017

See the entire solution process below:

Explanation:

First step, subtract $\textcolor{red}{18}$ from each side of the equation to isolate the $v$ term while keeping the equation balanced:

$18 - 4 v - \textcolor{red}{18} = 42 - \textcolor{red}{18}$

$18 - \textcolor{red}{18} - 4 v = 24$

$0 - 4 v = 24$

$- 4 v = 24$

Now, divide each side of the equation by $\textcolor{red}{- 4}$ to solve for $v$ while keeping the equation balanced:

$\frac{- 4 v}{\textcolor{red}{- 4}} = \frac{24}{\textcolor{red}{- 4}}$

$\frac{\textcolor{red}{\cancel{\textcolor{b l a c k}{- 4}}} v}{\cancel{\textcolor{red}{- 4}}} = - 6$

$v = - 6$