12k+3=-21

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Solution for 12k+3=-21 equation: 


Simplifying
12k + 3 = -21

Reorder the terms:
3 + 12k = -21

Solving
3 + 12k = -21

Solving for variable 'k'.

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

Add '-3' to each side of the equation.
3 + -3 + 12k = -21 + -3

Combine like terms: 3 + -3 = 0
0 + 12k = -21 + -3
12k = -21 + -3

Combine like terms: -21 + -3 = -24
12k = -24

Divide each side by '12'.
k = -2

Simplifying
k = -2

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