-21=k+9

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Solution for -21=k+9 equation:


Simplifying
-21 = k + 9

Reorder the terms:
-21 = 9 + k

Solving
-21 = 9 + k

Solving for variable 'k'.

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

Add '-1k' to each side of the equation.
-21 + -1k = 9 + k + -1k

Combine like terms: k + -1k = 0
-21 + -1k = 9 + 0
-21 + -1k = 9

Add '21' to each side of the equation.
-21 + 21 + -1k = 9 + 21

Combine like terms: -21 + 21 = 0
0 + -1k = 9 + 21
-1k = 9 + 21

Combine like terms: 9 + 21 = 30
-1k = 30

Divide each side by '-1'.
k = -30

Simplifying
k = -30

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