-3(3-6k)=6k+21

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Solution for -3(3-6k)=6k+21 equation: 



-3(3-6k)=6k+21

We move all terms to the left:

-3(3-6k)-(6k+21)=0

We add all the numbers together, and all the variables

-3(-6k+3)-(6k+21)=0

We multiply parentheses

18k-(6k+21)-9=0

We get rid of parentheses

18k-6k-21-9=0

We add all the numbers together, and all the variables

12k-30=0

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

12k=30

k=30/12

k=2+1/2

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