K-(-21)=39

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Solution for K-(-21)=39 equation: 


Simplifying
K + -1(-21) = 39

Multiply -1 * -21
K + 21 = 39

Reorder the terms:
21 + K = 39

Solving
21 + K = 39

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 = 39 + -21

Combine like terms: 21 + -21 = 0
0 + K = 39 + -21
K = 39 + -21

Combine like terms: 39 + -21 = 18
K = 18

Simplifying
K = 18

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