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-2.1y+-4.6y+10.7y=0.25
We move all terms to the left:
-2.1y+-4.6y+10.7y-(0.25)=0
We add all the numbers together, and all the variables
4y-0.25=0
We move all terms containing y to the left, all other terms to the right
4y=0.25
y=0.25/4
y=0.25/4
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