-20k=-840

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Solution for -20k=-840 equation: 



-20k=-840

We move all terms to the left:

-20k-(-840)=0

We add all the numbers together, and all the variables

-20k+840=0

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

-20k=-840

k=-840/-20

k=+42

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