y-3.9=-2.1

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Solution for y-3.9=-2.1 equation: 



y-3.9=-2.1

We move all terms to the left:

y-3.9-(-2.1)=0

We add all the numbers together, and all the variables

y-1.8=0

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

y=1.8

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