# How do you solve  3.2 = -0.4n?

Apr 12, 2018

$n = - 8$

#### Explanation:

To find the value of $n$, divide both sides by $- 0.4$. Then you have $\frac{3.2}{- 0.4} = \frac{- 0.4 n}{- 0.4}$, and since $\frac{- 0.4}{-} 0.4 = 1$,

$\frac{3.2}{- 0.4} = \frac{- 0.4 n}{- 0.4}$ simplifies to

$\frac{3.2}{- 0.4} = \frac{- 0.4 n}{- 0.4}$, and finally,

$- 8 = n$

If you're having trouble figuring out what operation to use to find the value of a variable, think about what the opposite operation of the one you need to "undo" is. Like here, $n$ is multiplied by $- 0.4$, so we have to divide to get the variable by itself.
Hope this helps, and happy mathing!