13=8+k

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Solution for 13=8+k equation: 



13=8+k

We move all terms to the left:

13-(8+k)=0

We add all the numbers together, and all the variables

-(k+8)+13=0

We get rid of parentheses

-k-8+13=0

We add all the numbers together, and all the variables

-1k+5=0

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

-k=-5

k=-5/-1

k=+5

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