2a+1=-3a-9

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Solution for 2a+1=-3a-9 equation: 



2a+1=-3a-9

We move all terms to the left:

2a+1-(-3a-9)=0

We get rid of parentheses

2a+3a+9+1=0

We add all the numbers together, and all the variables

5a+10=0

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

5a=-10

a=-10/5

a=-2

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