3(5-4a)=-81

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Solution for 3(5-4a)=-81 equation: 



3(5-4a)=-81

We move all terms to the left:

3(5-4a)-(-81)=0

We add all the numbers together, and all the variables

3(-4a+5)-(-81)=0

We add all the numbers together, and all the variables

3(-4a+5)+81=0

We multiply parentheses

-12a+15+81=0

We add all the numbers together, and all the variables

-12a+96=0

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

-12a=-96

a=-96/-12

a=+8

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