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y=73.9+0.4y
We move all terms to the left:
y-(73.9+0.4y)=0
We add all the numbers together, and all the variables
y-(0.4y+73.9)=0
We get rid of parentheses
y-0.4y-73.9=0
We add all the numbers together, and all the variables
0.6y-73.9=0
We move all terms containing y to the left, all other terms to the right
0.6y=73.9
y=73.9/0.6
y=123+0.10000000000001/0.6
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