18=30-k

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Solution for 18=30-k equation:


Simplifying
18 = 30 + -1k

Solving
18 = 30 + -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 = 30 + -1k + k

Combine like terms: -1k + k = 0
18 + k = 30 + 0
18 + k = 30

Add '-18' to each side of the equation.
18 + -18 + k = 30 + -18

Combine like terms: 18 + -18 = 0
0 + k = 30 + -18
k = 30 + -18

Combine like terms: 30 + -18 = 12
k = 12

Simplifying
k = 12

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