-7(1-4k)=21

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Solution for -7(1-4k)=21 equation: 



-7(1-4k)=21

We move all terms to the left:

-7(1-4k)-(21)=0

We add all the numbers together, and all the variables

-7(-4k+1)-21=0

We multiply parentheses

28k-7-21=0

We add all the numbers together, and all the variables

28k-28=0

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

28k=28

k=28/28

k=1

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