6-k=21

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Solution for 6-k=21 equation: 


Simplifying
6 + -1k = 21

Solving
6 + -1k = 21

Solving for variable 'k'.

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

Add '-6' to each side of the equation.
6 + -6 + -1k = 21 + -6

Combine like terms: 6 + -6 = 0
0 + -1k = 21 + -6
-1k = 21 + -6

Combine like terms: 21 + -6 = 15
-1k = 15

Divide each side by '-1'.
k = -15

Simplifying
k = -15

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