30=k+-13

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Solution for 30=k+-13 equation: 



30=k+-13

We move all terms to the left:

30-(k+-13)=0

We add all the numbers together, and all the variables

-(k-13)+30=0

We get rid of parentheses

-k+13+30=0

We add all the numbers together, and all the variables

-1k+43=0

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

-k=-43

k=-43/-1

k=+43

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