3-4k=21

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Solution for 3-4k=21 equation: 



3-4k=21

We move all terms to the left:

3-4k-(21)=0

We add all the numbers together, and all the variables

-4k-18=0

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

-4k=18

k=18/-4

k=-4+1/2

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