-3(k-7)=21-3k

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Solution for -3(k-7)=21-3k equation: 



-3(k-7)=21-3k

We move all terms to the left:

-3(k-7)-(21-3k)=0

We add all the numbers together, and all the variables

-3(k-7)-(-3k+21)=0

We multiply parentheses

-3k-(-3k+21)+21=0

We get rid of parentheses

-3k+3k-21+21=0

We add all the numbers together, and all the variables

=0

k=0/1

k=0

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