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2.5=1.2-0.4y
We move all terms to the left:
2.5-(1.2-0.4y)=0
We add all the numbers together, and all the variables
-(-0.4y+1.2)+2.5=0
We get rid of parentheses
0.4y-1.2+2.5=0
We add all the numbers together, and all the variables
0.4y+1.3=0
We move all terms containing y to the left, all other terms to the right
0.4y=-1.3
y=-1.3/0.4
y=-3+0.1/0.4
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