2k-40=-20

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Solution for 2k-40=-20 equation: 



2k-40=-20

We move all terms to the left:

2k-40-(-20)=0

We add all the numbers together, and all the variables

2k-20=0

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

2k=20

k=20/2

k=10

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