z+81=9z+7

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


Simplifying
z + 81 = 9z + 7

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

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

Solving
81 + z = 7 + 9z

Solving for variable 'z'.

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

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

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

Combine like terms: 9z + -9z = 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 = -74
-8z = -74

Divide each side by '-8'.
z = 9.25

Simplifying
z = 9.25

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