9z-7=81+z

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Solution for 9z-7=81+z equation:


Simplifying
9z + -7 = 81 + z

Reorder the terms:
-7 + 9z = 81 + z

Solving
-7 + 9z = 81 + z

Solving for variable 'z'.

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

Add '-1z' to each side of the equation.
-7 + 9z + -1z = 81 + z + -1z

Combine like terms: 9z + -1z = 8z
-7 + 8z = 81 + z + -1z

Combine like terms: z + -1z = 0
-7 + 8z = 81 + 0
-7 + 8z = 81

Add '7' to each side of the equation.
-7 + 7 + 8z = 81 + 7

Combine like terms: -7 + 7 = 0
0 + 8z = 81 + 7
8z = 81 + 7

Combine like terms: 81 + 7 = 88
8z = 88

Divide each side by '8'.
z = 11

Simplifying
z = 11

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