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0.5y+0.9=0.3-0.1y
We move all terms to the left:
0.5y+0.9-(0.3-0.1y)=0
We add all the numbers together, and all the variables
0.5y-(-0.1y+0.3)+0.9=0
We get rid of parentheses
0.5y+0.1y-0.3+0.9=0
We add all the numbers together, and all the variables
0.6y+0.6=0
We move all terms containing y to the left, all other terms to the right
0.6y=-0.6
y=-0.6/0.6
y=-1
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