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7y+1.9=50.8
We move all terms to the left:
7y+1.9-(50.8)=0
We add all the numbers together, and all the variables
7y-48.9=0
We move all terms containing y to the left, all other terms to the right
7y=48.9
y=48.9/7
y=6+3.6315789473684/3.6842105263158
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