-20=-7(9a+6)

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Solution for -20=-7(9a+6) equation: 



-20=-7(9a+6)

We move all terms to the left:

-20-(-7(9a+6))=0



We calculate terms in parentheses: -(-7(9a+6)), so:

-7(9a+6)

We multiply parentheses

-63a-42

Back to the equation:

-(-63a-42)



We get rid of parentheses

63a+42-20=0

We add all the numbers together, and all the variables

63a+22=0

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

63a=-22

a=-22/63

a=-22/63

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