9k+4k+5k-13k=20

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Solution for 9k+4k+5k-13k=20 equation: 



9k+4k+5k-13k=20

We move all terms to the left:

9k+4k+5k-13k-(20)=0

We add all the numbers together, and all the variables

5k-20=0

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

5k=20

k=20/5

k=4

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