-7(1+7x)=-399

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Solution for -7(1+7x)=-399 equation: 



-7(1+7x)=-399

We move all terms to the left:

-7(1+7x)-(-399)=0

We add all the numbers together, and all the variables

-7(7x+1)-(-399)=0

We add all the numbers together, and all the variables

-7(7x+1)+399=0

We multiply parentheses

-49x-7+399=0

We add all the numbers together, and all the variables

-49x+392=0

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

-49x=-392

x=-392/-49

x=+8

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