-x=7(-21+x)

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



-x=7(-21+x)

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

-1x-(7(x-21))=0



We calculate terms in parentheses: -(7(x-21)), so:

7(x-21)

We multiply parentheses

7x-147

Back to the equation:

-(7x-147)



We get rid of parentheses

-1x-7x+147=0

We add all the numbers together, and all the variables

-8x+147=0

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

-8x=-147

x=-147/-8

x=18+3/8

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