18=-k-3

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Solution for 18=-k-3 equation:


Simplifying
18 = -1k + -3

Reorder the terms:
18 = -3 + -1k

Solving
18 = -3 + -1k

Solving for variable 'k'.

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

Add 'k' to each side of the equation.
18 + k = -3 + -1k + k

Combine like terms: -1k + k = 0
18 + k = -3 + 0
18 + k = -3

Add '-18' to each side of the equation.
18 + -18 + k = -3 + -18

Combine like terms: 18 + -18 = 0
0 + k = -3 + -18
k = -3 + -18

Combine like terms: -3 + -18 = -21
k = -21

Simplifying
k = -21

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