9k-90=-1

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Solution for 9k-90=-1 equation: 


Simplifying
9k + -90 = -1

Reorder the terms:
-90 + 9k = -1

Solving
-90 + 9k = -1

Solving for variable 'k'.

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

Add '90' to each side of the equation.
-90 + 90 + 9k = -1 + 90

Combine like terms: -90 + 90 = 0
0 + 9k = -1 + 90
9k = -1 + 90

Combine like terms: -1 + 90 = 89
9k = 89

Divide each side by '9'.
k = 9.888888889

Simplifying
k = 9.888888889

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