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2y+2.2y=1.8
We move all terms to the left:
2y+2.2y-(1.8)=0
We add all the numbers together, and all the variables
4.2y-1.8=0
We move all terms containing y to the left, all other terms to the right
4.2y=1.8
y=1.8/4.2
y=1/2.3333333333333
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