7(8+7x)=399

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



7(8+7x)=399

We move all terms to the left:

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

We add all the numbers together, and all the variables

7(7x+8)-399=0

We multiply parentheses

49x+56-399=0

We add all the numbers together, and all the variables

49x-343=0

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

49x=343

x=343/49

x=7

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