7*(9+k)=84

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Solution for 7*(9+k)=84 equation: 



7(9+k)=84

We move all terms to the left:

7(9+k)-(84)=0

We add all the numbers together, and all the variables

7(k+9)-84=0

We multiply parentheses

7k+63-84=0

We add all the numbers together, and all the variables

7k-21=0

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

7k=21

k=21/7

k=3

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