3a=-2.1

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Solution for 3a=-2.1 equation: 



3a=-2.1

We move all terms to the left:

3a-(-2.1)=0

We add all the numbers together, and all the variables

3a+2.1=0

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

3a=-2.1

a=-2.1/3

a=-2.1/3

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