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0.4x+0.3=0.8x-0.5
We move all terms to the left:
0.4x+0.3-(0.8x-0.5)=0
We get rid of parentheses
0.4x-0.8x+0.5+0.3=0
We add all the numbers together, and all the variables
-0.4x+0.8=0
We move all terms containing x to the left, all other terms to the right
-0.4x=-0.8
x=-0.8/-0.4
x=+2
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