30=3k+15

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Solution for 30=3k+15 equation: 



30=3k+15

We move all terms to the left:

30-(3k+15)=0

We get rid of parentheses

-3k-15+30=0

We add all the numbers together, and all the variables

-3k+15=0

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

-3k=-15

k=-15/-3

k=+5

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