9k-90=-1k

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Solution for 9k-90=-1k equation:


Simplifying
9k + -90 = -1k

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

Solving
-90 + 9k = -1k

Solving for variable 'k'.

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

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

Combine like terms: 9k + k = 10k
-90 + 10k = -1k + k

Combine like terms: -1k + k = 0
-90 + 10k = 0

Add '90' to each side of the equation.
-90 + 90 + 10k = 0 + 90

Combine like terms: -90 + 90 = 0
0 + 10k = 0 + 90
10k = 0 + 90

Combine like terms: 0 + 90 = 90
10k = 90

Divide each side by '10'.
k = 9

Simplifying
k = 9

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