7z-1=8z

Solution for 7z-1=8z equation:

Simplifying
7z + -1 = 8z

Reorder the terms:
-1 + 7z = 8z

Solving
-1 + 7z = 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 + 7z + -8z = 8z + -8z

Combine like terms: 7z + -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