K(x)=-x+7

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Solution for K(x)=-x+7 equation: 



(K)=-K+7

We move all terms to the left:

(K)-(-K+7)=0

We add all the numbers together, and all the variables

K-(-1K+7)=0

We get rid of parentheses

K+1K-7=0

We add all the numbers together, and all the variables

2K-7=0

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

2K=7

K=7/2

K=3+1/2

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