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0.3x+0.5=0.4x-0.2
We move all terms to the left:
0.3x+0.5-(0.4x-0.2)=0
We get rid of parentheses
0.3x-0.4x+0.2+0.5=0
We add all the numbers together, and all the variables
-0.1x+0.7=0
We move all terms containing x to the left, all other terms to the right
-0.1x=-0.7
x=-0.7/-0.1
x=6+0.1/0.1
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