(k+5)(9)=(10)(k-12)

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Solution for (k+5)(9)=(10)(k-12) equation: 



(k+5)(9)=(10)(k-12)

We move all terms to the left:

(k+5)(9)-((10)(k-12))=0

We multiply parentheses

9k-(10(k-12))+45=0



We calculate terms in parentheses: -(10(k-12)), so:

10(k-12)

We multiply parentheses

10k-120

Back to the equation:

-(10k-120)



We get rid of parentheses

9k-10k+120+45=0

We add all the numbers together, and all the variables

-1k+165=0

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

-k=-165

k=-165/-1

k=+165

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