Solve for z. Isolate the z. Note the equal sign. What you do to one side, you do to the other side.
Subtract 4/5 from both sides
z + 4/5 (-4/5) = 11 (-4/5)
z = 10 5/5 - 4/5
Simplify
z = 10 1/5
10 1/5 is your answer for z
hope this helps
