2(-2-k)-1=6k-21

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Solution for 2(-2-k)-1=6k-21 equation: 



2(-2-k)-1=6k-21

We move all terms to the left:

2(-2-k)-1-(6k-21)=0

We add all the numbers together, and all the variables

2(-1k-2)-(6k-21)-1=0

We multiply parentheses

-2k-(6k-21)-4-1=0

We get rid of parentheses

-2k-6k+21-4-1=0

We add all the numbers together, and all the variables

-8k+16=0

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

-8k=-16

k=-16/-8

k=+2

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