7k-3k=5-21

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Solution for 7k-3k=5-21 equation: 



7k-3k=5-21

We move all terms to the left:

7k-3k-(5-21)=0

We add all the numbers together, and all the variables

7k-3k-(-16)=0

We add all the numbers together, and all the variables

4k+16=0

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

4k=-16

k=-16/4

k=-4

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