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0.4x+1.2=0.8x
We move all terms to the left:
0.4x+1.2-(0.8x)=0
We add all the numbers together, and all the variables
0.4x-(+0.8x)+1.2=0
We get rid of parentheses
0.4x-0.8x+1.2=0
We add all the numbers together, and all the variables
-0.4x+1.2=0
We move all terms containing x to the left, all other terms to the right
-0.4x=-1.2
x=-1.2/-0.4
x=2+0.4/0.4
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