5a/6 - a/3 - 2/3 = -1/6

Question

What is "a"?

The / is a fraction

Answer 1

5a/6 - a/3 - 2/3 = -1/6
a(5/6 - 1/3) = -1/6 + 2/3
a(1/2) = 1/2
a = 1