-203=-7(9+k)

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Solution for -203=-7(9+k) equation: 



-203=-7(9+k)

We move all terms to the left:

-203-(-7(9+k))=0

We add all the numbers together, and all the variables

-(-7(k+9))-203=0



We calculate terms in parentheses: -(-7(k+9)), so:

-7(k+9)

We multiply parentheses

-7k-63

Back to the equation:

-(-7k-63)



We get rid of parentheses

7k+63-203=0

We add all the numbers together, and all the variables

7k-140=0

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

7k=140

k=140/7

k=20

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