K+21=4k

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Solution for K+21=4k equation: 


Simplifying
K + 21 = 4k

Reorder the terms:
21 + K = 4k

Solving
21 + K = 4k

Solving for variable 'K'.

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

Add '-21' to each side of the equation.
21 + -21 + K = -21 + 4k

Combine like terms: 21 + -21 = 0
0 + K = -21 + 4k
K = -21 + 4k

Simplifying
K = -21 + 4k

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