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0.45y-0.8=1
We move all terms to the left:
0.45y-0.8-(1)=0
We add all the numbers together, and all the variables
0.45y-1.8=0
We move all terms containing y to the left, all other terms to the right
0.45y=1.8
y=1.8/0.45
y=4
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