9k-25=4k-100

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Solution for 9k-25=4k-100 equation: 



9k-25=4k-100

We move all terms to the left:

9k-25-(4k-100)=0

We get rid of parentheses

9k-4k+100-25=0

We add all the numbers together, and all the variables

5k+75=0

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

5k=-75

k=-75/5

k=-15

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