20=5+5k

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Solution for 20=5+5k equation: 



20=5+5k

We move all terms to the left:

20-(5+5k)=0

We add all the numbers together, and all the variables

-(5k+5)+20=0

We get rid of parentheses

-5k-5+20=0

We add all the numbers together, and all the variables

-5k+15=0

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

-5k=-15

k=-15/-5

k=+3

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