10k+9=99

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Solution for 10k+9=99 equation: 



10k+9=99

We move all terms to the left:

10k+9-(99)=0

We add all the numbers together, and all the variables

10k-90=0

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

10k=90

k=90/10

k=9

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