-5x-21=-4(5x-6)

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Solution for -5x-21=-4(5x-6) equation: 



-5x-21=-4(5x-6)

We move all terms to the left:

-5x-21-(-4(5x-6))=0



We calculate terms in parentheses: -(-4(5x-6)), so:

-4(5x-6)

We multiply parentheses

-20x+24

Back to the equation:

-(-20x+24)



We get rid of parentheses

-5x+20x-24-21=0

We add all the numbers together, and all the variables

15x-45=0

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

15x=45

x=45/15

x=3

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