20+9k=-20-11k

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Solution for 20+9k=-20-11k equation: 



20+9k=-20-11k

We move all terms to the left:

20+9k-(-20-11k)=0

We add all the numbers together, and all the variables

9k-(-11k-20)+20=0

We get rid of parentheses

9k+11k+20+20=0

We add all the numbers together, and all the variables

20k+40=0

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

20k=-40

k=-40/20

k=-2

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