20-15k=-20-11k-20

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Solution for 20-15k=-20-11k-20 equation: 



20-15k=-20-11k-20

We move all terms to the left:

20-15k-(-20-11k-20)=0

We add all the numbers together, and all the variables

-15k-(-11k-40)+20=0

We get rid of parentheses

-15k+11k+40+20=0

We add all the numbers together, and all the variables

-4k+60=0

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

-4k=-60

k=-60/-4

k=+15

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