-5(a-1)-9=3(4-a)

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Solution for -5(a-1)-9=3(4-a) equation: 



-5(a-1)-9=3(4-a)

We move all terms to the left:

-5(a-1)-9-(3(4-a))=0

We add all the numbers together, and all the variables

-5(a-1)-(3(-1a+4))-9=0

We multiply parentheses

-5a-(3(-1a+4))+5-9=0



We calculate terms in parentheses: -(3(-1a+4)), so:

3(-1a+4)

We multiply parentheses

-3a+12

Back to the equation:

-(-3a+12)



We add all the numbers together, and all the variables

-5a-(-3a+12)-4=0

We get rid of parentheses

-5a+3a-12-4=0

We add all the numbers together, and all the variables

-2a-16=0

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

-2a=16

a=16/-2

a=-8

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