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1.21=1.21+y
We move all terms to the left:
1.21-(1.21+y)=0
We add all the numbers together, and all the variables
-(y+1.21)+1.21=0
We get rid of parentheses
-y-1.21+1.21=0
We add all the numbers together, and all the variables
-y=0
y=0/-1
y=0
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