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83.4-0.5=y-3.80
We move all terms to the left:
83.4-0.5-(y-3.80)=0
We add all the numbers together, and all the variables
-(y-3.8)+83.4-0.5=0
We add all the numbers together, and all the variables
-(y-3.8)+82.9=0
We get rid of parentheses
-y+3.8+82.9=0
We add all the numbers together, and all the variables
-1y+86.7=0
We move all terms containing y to the left, all other terms to the right
-y=-86.7
y=-86.7/-1
y=86+0.7/1
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