a-1+3a=-1-a

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Solution for a-1+3a=-1-a equation: 



a-1+3a=-1-a

We move all terms to the left:

a-1+3a-(-1-a)=0

We add all the numbers together, and all the variables

a+3a-(-1a-1)-1=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

4a+1a+1-1=0

We add all the numbers together, and all the variables

5a=0

a=0/5

a=0

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