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0.8y-7=9.4
We move all terms to the left:
0.8y-7-(9.4)=0
We add all the numbers together, and all the variables
0.8y-16.4=0
We move all terms containing y to the left, all other terms to the right
0.8y=16.4
y=16.4/0.8
y=20+0.4/0.8
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