[tex] \frac{n}{5} - \frac{9n}{10} = \frac{1}{5} [/tex]
[tex] \frac{n}{5}* \frac{2}{2}- \frac{9n}{10} = \frac{1}{5} [/tex]
[tex] \frac{2n}{10}- \frac{9n}{10} = \frac{1}{5} [/tex]
[tex]\frac{-7n}{10} = \frac{1}{5} [/tex] (multiply each side by 10)
-7n = 1/5 * 10
-7n = 10/5
-7n = 2 (divide eaach side by -7)
n = 2/-7
[tex]n =- \frac{2}{7} \ \textless \ -answer[/tex] (or about -0.286)
