7-10k=87

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Solution for 7-10k=87 equation: 



7-10k=87

We move all terms to the left:

7-10k-(87)=0

We add all the numbers together, and all the variables

-10k-80=0

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

-10k=80

k=80/-10

k=-8

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