18+k=30.

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Solution for 18+k=30. equation: 



18+k=30.

We move all terms to the left:

18+k-(30.)=0

We add all the numbers together, and all the variables

k+18-30=0

We add all the numbers together, and all the variables

k-12=0

We move all terms containing k to the left, all other terms to the right

k=12

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