9+1k+2k=1-1k

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Solution for 9+1k+2k=1-1k equation: 



9+1k+2k=1-1k

We move all terms to the left:

9+1k+2k-(1-1k)=0

We add all the numbers together, and all the variables

1k+2k-(-1k+1)+9=0

We add all the numbers together, and all the variables

3k-(-1k+1)+9=0

We get rid of parentheses

3k+1k-1+9=0

We add all the numbers together, and all the variables

4k+8=0

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

4k=-8

k=-8/4

k=-2

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