7=1+2k

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Solution for 7=1+2k equation: 



7=1+2k

We move all terms to the left:

7-(1+2k)=0

We add all the numbers together, and all the variables

-(2k+1)+7=0

We get rid of parentheses

-2k-1+7=0

We add all the numbers together, and all the variables

-2k+6=0

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

-2k=-6

k=-6/-2

k=+3

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