-2(-9-5a)=78

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Solution for -2(-9-5a)=78 equation: 



-2(-9-5a)=78

We move all terms to the left:

-2(-9-5a)-(78)=0

We add all the numbers together, and all the variables

-2(-5a-9)-78=0

We multiply parentheses

10a+18-78=0

We add all the numbers together, and all the variables

10a-60=0

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

10a=60

a=60/10

a=6

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