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0.2y+0.4=0.1-0.1y
We move all terms to the left:
0.2y+0.4-(0.1-0.1y)=0
We add all the numbers together, and all the variables
0.2y-(-0.1y+0.1)+0.4=0
We get rid of parentheses
0.2y+0.1y-0.1+0.4=0
We add all the numbers together, and all the variables
0.3y+0.3=0
We move all terms containing y to the left, all other terms to the right
0.3y=-0.3
y=-0.3/0.3
y=-1
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