9z-1=9z-z

Solution for 9z-1=9z-z equation:

Simplifying
9z + -1 = 9z + -1z

Reorder the terms:
-1 + 9z = 9z + -1z

Combine like terms: 9z + -1z = 8z
-1 + 9z = 8z

Solving
-1 + 9z = 8z

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add '-8z' to each side of the equation.
-1 + 9z + -8z = 8z + -8z

Combine like terms: 9z + -8z = 1z
-1 + 1z = 8z + -8z

Combine like terms: 8z + -8z = 0
-1 + 1z = 0

Add '1' to each side of the equation.
-1 + 1 + 1z = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 1z = 0 + 1
1z = 0 + 1

Combine like terms: 0 + 1 = 1
1z = 1

Divide each side by '1'.
z = 1

Simplifying
z = 1