81=8z-7

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Solution for 81=8z-7 equation:


Simplifying
81 = 8z + -7

Reorder the terms:
81 = -7 + 8z

Solving
81 = -7 + 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.
81 + -8z = -7 + 8z + -8z

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

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

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

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

Divide each side by '-8'.
z = 11

Simplifying
z = 11

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