10k+15=7(k-9)

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Solution for 10k+15=7(k-9) equation: 



10k+15=7(k-9)

We move all terms to the left:

10k+15-(7(k-9))=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

10k-7k+63+15=0

We add all the numbers together, and all the variables

3k+78=0

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

3k=-78

k=-78/3

k=-26

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