-7=-7(3x+7)

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Solution for -7=-7(3x+7) equation: 



-7=-7(3x+7)

We move all terms to the left:

-7-(-7(3x+7))=0



We calculate terms in parentheses: -(-7(3x+7)), so:

-7(3x+7)

We multiply parentheses

-21x-49

Back to the equation:

-(-21x-49)



We get rid of parentheses

21x+49-7=0

We add all the numbers together, and all the variables

21x+42=0

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

21x=-42

x=-42/21

x=-2

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