19=-9(4a+8)

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Solution for 19=-9(4a+8) equation: 



19=-9(4a+8)

We move all terms to the left:

19-(-9(4a+8))=0



We calculate terms in parentheses: -(-9(4a+8)), so:

-9(4a+8)

We multiply parentheses

-36a-72

Back to the equation:

-(-36a-72)



We get rid of parentheses

36a+72+19=0

We add all the numbers together, and all the variables

36a+91=0

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

36a=-91

a=-91/36

a=-2+19/36

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