3a+9=-4

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Solution for 3a+9=-4 equation: 



3a+9=-4

We move all terms to the left:

3a+9-(-4)=0

We add all the numbers together, and all the variables

3a+13=0

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

3a=-13

a=-13/3

a=-4+1/3

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