(7k+8)+40=90

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Solution for (7k+8)+40=90 equation: 



(7k+8)+40=90

We move all terms to the left:

(7k+8)+40-(90)=0

We add all the numbers together, and all the variables

(7k+8)-50=0

We get rid of parentheses

7k+8-50=0

We add all the numbers together, and all the variables

7k-42=0

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

7k=42

k=42/7

k=6

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