1=k+5-7

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Solution for 1=k+5-7 equation: 



1=k+5-7

We move all terms to the left:

1-(k+5-7)=0

We add all the numbers together, and all the variables

-(k-2)+1=0

We get rid of parentheses

-k+2+1=0

We add all the numbers together, and all the variables

-1k+3=0

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

-k=-3

k=-3/-1

k=+3

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