1+8k=10k-9

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Solution for 1+8k=10k-9 equation: 



1+8k=10k-9

We move all terms to the left:

1+8k-(10k-9)=0

We get rid of parentheses

8k-10k+9+1=0

We add all the numbers together, and all the variables

-2k+10=0

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

-2k=-10

k=-10/-2

k=+5

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