3*4(-1)=a

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Solution for 3*4(-1)=a equation: 



3*4(-1)=a

We move all terms to the left:

3*4(-1)-(a)=0

We add all the numbers together, and all the variables

-1a-12=0

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

-a=12

a=12/-1

a=-12

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