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4.9=y-3.8
We move all terms to the left:
4.9-(y-3.8)=0
We get rid of parentheses
-y+3.8+4.9=0
We add all the numbers together, and all the variables
-1y+8.7=0
We move all terms containing y to the left, all other terms to the right
-y=-8.7
y=-8.7/-1
y=8+0.7/1
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