100-4k=9k+9

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Solution for 100-4k=9k+9 equation: 



100-4k=9k+9

We move all terms to the left:

100-4k-(9k+9)=0

We get rid of parentheses

-4k-9k-9+100=0

We add all the numbers together, and all the variables

-13k+91=0

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

-13k=-91

k=-91/-13

k=+7

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