7+21=-4(7x+7)

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Solution for 7+21=-4(7x+7) equation: 



7+21=-4(7x+7)

We move all terms to the left:

7+21-(-4(7x+7))=0

We add all the numbers together, and all the variables

-(-4(7x+7))+28=0



We calculate terms in parentheses: -(-4(7x+7)), so:

-4(7x+7)

We multiply parentheses

-28x-28

Back to the equation:

-(-28x-28)



We get rid of parentheses

28x+28+28=0

We add all the numbers together, and all the variables

28x+56=0

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

28x=-56

x=-56/28

x=-2

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