a-1+a=-3

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



a-1+a=-3

We move all terms to the left:

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

We add all the numbers together, and all the variables

2a+2=0

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

2a=-2

a=-2/2

a=-1

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