21-9x=-5(7x+2)-5(-4-5x)

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Solution for 21-9x=-5(7x+2)-5(-4-5x) equation: 



21-9x=-5(7x+2)-5(-4-5x)

We move all terms to the left:

21-9x-(-5(7x+2)-5(-4-5x))=0

We add all the numbers together, and all the variables

-9x-(-5(7x+2)-5(-5x-4))+21=0



We calculate terms in parentheses: -(-5(7x+2)-5(-5x-4)), so:

-5(7x+2)-5(-5x-4)

We multiply parentheses

-35x+25x-10+20

We add all the numbers together, and all the variables

-10x+10

Back to the equation:

-(-10x+10)



We get rid of parentheses

-9x+10x-10+21=0

We add all the numbers together, and all the variables

x+11=0

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

x=-11

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