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.8-2y=4
We move all terms to the left:
.8-2y-(4)=0
We add all the numbers together, and all the variables
-2y-3.2=0
We move all terms containing y to the left, all other terms to the right
-2y=3.2
y=3.2/-2
y=-1+1/1.6666666666667
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