7k-(-9k)-12k-13k-3k=12

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Solution for 7k-(-9k)-12k-13k-3k=12 equation: 



7k-(-9k)-12k-13k-3k=12

We move all terms to the left:

7k-(-9k)-12k-13k-3k-(12)=0

We add all the numbers together, and all the variables

-21k-(-9k)-12=0

We get rid of parentheses

-21k+9k-12=0

We add all the numbers together, and all the variables

-12k-12=0

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

-12k=12

k=12/-12

k=-1

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