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0.9=y-2.8
We move all terms to the left:
0.9-(y-2.8)=0
We get rid of parentheses
-y+2.8+0.9=0
We add all the numbers together, and all the variables
-1y+3.7=0
We move all terms containing y to the left, all other terms to the right
-y=-3.7
y=-3.7/-1
y=3+0.7/1
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