12=20-4k

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Solution for 12=20-4k equation: 



12=20-4k

We move all terms to the left:

12-(20-4k)=0

We add all the numbers together, and all the variables

-(-4k+20)+12=0

We get rid of parentheses

4k-20+12=0

We add all the numbers together, and all the variables

4k-8=0

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

4k=8

k=8/4

k=2

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