Answer:
[tex]4b = 2a - t[/tex]
[tex]2a = 4b + t[/tex]
[tex]a = \frac{4b + t}{2} [/tex]
[tex]4b = 2a - t \\ 4b + t = 2a \\ \frac{4b + t}{2} = a \: or \: a = \frac{4b + t}{2} [/tex]
