(k+10)(3K)=90

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Solution for (k+10)(3K)=90 equation: 



(k+10)(3)=90

We move all terms to the left:

(k+10)(3)-(90)=0

We multiply parentheses

3k+30-90=0

We add all the numbers together, and all the variables

3k-60=0

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

3k=60

k=60/3

k=20

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