3(9+4a)-19=42

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Solution for 3(9+4a)-19=42 equation: 



3(9+4a)-19=42

We move all terms to the left:

3(9+4a)-19-(42)=0

We add all the numbers together, and all the variables

3(4a+9)-19-42=0

We add all the numbers together, and all the variables

3(4a+9)-61=0

We multiply parentheses

12a+27-61=0

We add all the numbers together, and all the variables

12a-34=0

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

12a=34

a=34/12

a=2+5/6

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