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-2.863-0.8y=-2.86
We move all terms to the left:
-2.863-0.8y-(-2.86)=0
We add all the numbers together, and all the variables
-0.8y-0.0030000000000001=0
We move all terms containing y to the left, all other terms to the right
-0.8y=0.0030000000000001
y=0.0030000000000001/-0.8
y=-0.0030000000000001/0.8
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