0.9-3=y

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Solution for 0.9-3=y equation: 



0.9-3=y

We move all terms to the left:

0.9-3-(y)=0

We add all the numbers together, and all the variables

-1y-2.1=0

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

-y=2.1

y=2.1/-1

y=-2+0.1/1

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