-3=9+k

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Solution for -3=9+k equation:


Simplifying
-3 = 9 + k

Solving
-3 = 9 + k

Solving for variable 'k'.

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

Add '-1k' to each side of the equation.
-3 + -1k = 9 + k + -1k

Combine like terms: k + -1k = 0
-3 + -1k = 9 + 0
-3 + -1k = 9

Add '3' to each side of the equation.
-3 + 3 + -1k = 9 + 3

Combine like terms: -3 + 3 = 0
0 + -1k = 9 + 3
-1k = 9 + 3

Combine like terms: 9 + 3 = 12
-1k = 12

Divide each side by '-1'.
k = -12

Simplifying
k = -12

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