7(-3x-7)=-(5x-20)

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Solution for 7(-3x-7)=-(5x-20) equation: 



7(-3x-7)=-(5x-20)

We move all terms to the left:

7(-3x-7)-(-(5x-20))=0

We multiply parentheses

-21x-(-(5x-20))-49=0



We calculate terms in parentheses: -(-(5x-20)), so:

-(5x-20)

We get rid of parentheses

-5x+20

Back to the equation:

-(-5x+20)



We get rid of parentheses

-21x+5x-20-49=0

We add all the numbers together, and all the variables

-16x-69=0

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

-16x=69

x=69/-16

x=-4+5/16

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