-7=-13+k

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Solution for -7=-13+k equation: 



-7=-13+k

We move all terms to the left:

-7-(-13+k)=0

We add all the numbers together, and all the variables

-(k-13)-7=0

We get rid of parentheses

-k+13-7=0

We add all the numbers together, and all the variables

-1k+6=0

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

-k=-6

k=-6/-1

k=+6

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