a*(-1)+(-2)=1

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Solution for a*(-1)+(-2)=1 equation: 



a(-1)+(-2)=1

We move all terms to the left:

a(-1)+(-2)-(1)=0

determiningTheFunctionDomain
a(-1)-1+(-2)=0

We add all the numbers together, and all the variables

a(-1)-3=0

We multiply parentheses

-1a-3=0

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

-a=3

a=3/-1

a=-3

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