4k-9k=90

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Solution for 4k-9k=90 equation: 



4k-9k=90

We move all terms to the left:

4k-9k-(90)=0

We add all the numbers together, and all the variables

-5k-90=0

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

-5k=90

k=90/-5

k=-18

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