3(-5-4a)-3=-78

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Solution for 3(-5-4a)-3=-78 equation: 



3(-5-4a)-3=-78

We move all terms to the left:

3(-5-4a)-3-(-78)=0

We add all the numbers together, and all the variables

3(-4a-5)-3-(-78)=0

We add all the numbers together, and all the variables

3(-4a-5)+75=0

We multiply parentheses

-12a-15+75=0

We add all the numbers together, and all the variables

-12a+60=0

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

-12a=-60

a=-60/-12

a=+5

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