-7(1+4x)=-343

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Solution for -7(1+4x)=-343 equation: 



-7(1+4x)=-343

We move all terms to the left:

-7(1+4x)-(-343)=0

We add all the numbers together, and all the variables

-7(4x+1)-(-343)=0

We add all the numbers together, and all the variables

-7(4x+1)+343=0

We multiply parentheses

-28x-7+343=0

We add all the numbers together, and all the variables

-28x+336=0

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

-28x=-336

x=-336/-28

x=+12

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