7(1+8x)=399

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Solution for 7(1+8x)=399 equation: 



7(1+8x)=399

We move all terms to the left:

7(1+8x)-(399)=0

We add all the numbers together, and all the variables

7(8x+1)-399=0

We multiply parentheses

56x+7-399=0

We add all the numbers together, and all the variables

56x-392=0

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

56x=392

x=392/56

x=7

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