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0.4y+2=0.8y-6
We move all terms to the left:
0.4y+2-(0.8y-6)=0
We get rid of parentheses
0.4y-0.8y+6+2=0
We add all the numbers together, and all the variables
-0.4y+8=0
We move all terms containing y to the left, all other terms to the right
-0.4y=-8
y=-8/-0.4
y=+20
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