[tex]t = \frac{3}{20} [/tex]
[tex] \frac{1}{3} t + \frac{4}{5} = \frac{3}{5} - t[/tex]
[tex] \frac{1}{3} t + \frac{4}{5} - \frac{4}{5} = \frac{3}{5} - t - \frac{4}{5} [/tex]
[tex] \frac{1}{3} t = - t - \frac{1}{5} [/tex]
[tex] \frac{1}{3} t + t = - t - \frac{1}{5} + t[/tex]
[tex]4t = - \frac{3}{5} [/tex]
[tex] \frac{4t}{4} = \frac{ - \frac{3}{5} }{4} [/tex]
[tex]t = - \frac{3}{2 0} [/tex]
= [tex]t = - \frac{3}{20} [/tex]