-1=3(x-7)-7x

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Solution for -1=3(x-7)-7x equation: 



-1=3(x-7)-7x

We move all terms to the left:

-1-(3(x-7)-7x)=0



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

3(x-7)-7x

We add all the numbers together, and all the variables

-7x+3(x-7)

We multiply parentheses

-7x+3x-21

We add all the numbers together, and all the variables

-4x-21

Back to the equation:

-(-4x-21)



We get rid of parentheses

4x+21-1=0

We add all the numbers together, and all the variables

4x+20=0

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

4x=-20

x=-20/4

x=-5

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