20=-4(3a-)

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Solution for 20=-4(3a-) equation: 



20=-4(3a-)

We move all terms to the left:

20-(-4(3a-))=0

We add all the numbers together, and all the variables

-(-4(+3a))+20=0



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

-4(+3a)

We multiply parentheses

-12a

Back to the equation:

-(-12a)



We get rid of parentheses

12a+20=0

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

12a=-20

a=-20/12

a=-1+2/3

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