11k-11=7k-21

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Solution for 11k-11=7k-21 equation: 



11k-11=7k-21

We move all terms to the left:

11k-11-(7k-21)=0

We get rid of parentheses

11k-7k+21-11=0

We add all the numbers together, and all the variables

4k+10=0

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

4k=-10

k=-10/4

k=-2+1/2

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