19a-12=-57+4a

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Solution for 19a-12=-57+4a equation: 



19a-12=-57+4a

We move all terms to the left:

19a-12-(-57+4a)=0

We add all the numbers together, and all the variables

19a-(4a-57)-12=0

We get rid of parentheses

19a-4a+57-12=0

We add all the numbers together, and all the variables

15a+45=0

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

15a=-45

a=-45/15

a=-3

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