3a=-0.21

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Solution for 3a=-0.21 equation: 



3a=-0.21

We move all terms to the left:

3a-(-0.21)=0

We add all the numbers together, and all the variables

3a+0.21=0

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

3a=-0.21

a=-0.21/3

a=-0.21/3

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