-21=-(7x+6)-2(-4x+8)

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Solution for -21=-(7x+6)-2(-4x+8) equation: 



-21=-(7x+6)-2(-4x+8)

We move all terms to the left:

-21-(-(7x+6)-2(-4x+8))=0



We calculate terms in parentheses: -(-(7x+6)-2(-4x+8)), so:

-(7x+6)-2(-4x+8)

We multiply parentheses

-(7x+6)+8x-16

We get rid of parentheses

-7x+8x-6-16

We add all the numbers together, and all the variables

x-22

Back to the equation:

-(x-22)



We get rid of parentheses

-x+22-21=0

We add all the numbers together, and all the variables

-1x+1=0

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

-x=-1

x=-1/-1

x=1

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