45=-9-3k

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Solution for 45=-9-3k equation: 



45=-9-3k

We move all terms to the left:

45-(-9-3k)=0

We add all the numbers together, and all the variables

-(-3k-9)+45=0

We get rid of parentheses

3k+9+45=0

We add all the numbers together, and all the variables

3k+54=0

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

3k=-54

k=-54/3

k=-18

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