3(4+k)=-30

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Solution for 3(4+k)=-30 equation: 


Simplifying
3(4 + k) = -30
(4 * 3 + k * 3) = -30
(12 + 3k) = -30

Solving
12 + 3k = -30

Solving for variable 'k'.

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

Add '-12' to each side of the equation.
12 + -12 + 3k = -30 + -12

Combine like terms: 12 + -12 = 0
0 + 3k = -30 + -12
3k = -30 + -12

Combine like terms: -30 + -12 = -42
3k = -42

Divide each side by '3'.
k = -14

Simplifying
k = -14

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