7+7(7k+3)=126

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Solution for 7+7(7k+3)=126 equation: 



7+7(7k+3)=126

We move all terms to the left:

7+7(7k+3)-(126)=0

We add all the numbers together, and all the variables

7(7k+3)-119=0

We multiply parentheses

49k+21-119=0

We add all the numbers together, and all the variables

49k-98=0

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

49k=98

k=98/49

k=2

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