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3.6+2y.y=-0.5
We move all terms to the left:
3.6+2y.y-(-0.5)=0
We add all the numbers together, and all the variables
2y.y+4.1=0
We move all terms containing y to the left, all other terms to the right
2y.y=-4.1
y=-4.1/1
y=-4.1
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