20(-12x-21)=-3(x+4)

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Solution for 20(-12x-21)=-3(x+4) equation: 



20(-12x-21)=-3(x+4)

We move all terms to the left:

20(-12x-21)-(-3(x+4))=0

We multiply parentheses

-240x-(-3(x+4))-420=0



We calculate terms in parentheses: -(-3(x+4)), so:

-3(x+4)

We multiply parentheses

-3x-12

Back to the equation:

-(-3x-12)



We get rid of parentheses

-240x+3x+12-420=0

We add all the numbers together, and all the variables

-237x-408=0

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

-237x=408

x=408/-237

x=-1+57/79

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