k-k+3k+4k=7

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Solution for k-k+3k+4k=7 equation: 



k-k+3k+4k=7

We move all terms to the left:

k-k+3k+4k-(7)=0

We add all the numbers together, and all the variables

7k-7=0

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

7k=7

k=7/7

k=1

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