9-k=10k+20

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Solution for 9-k=10k+20 equation: 



9-k=10k+20

We move all terms to the left:

9-k-(10k+20)=0

We add all the numbers together, and all the variables

-1k-(10k+20)+9=0

We get rid of parentheses

-1k-10k-20+9=0

We add all the numbers together, and all the variables

-11k-11=0

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

-11k=11

k=11/-11

k=-1

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