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0.4x-0.5=0.3x+8
We move all terms to the left:
0.4x-0.5-(0.3x+8)=0
We get rid of parentheses
0.4x-0.3x-8-0.5=0
We add all the numbers together, and all the variables
0.1x-8.5=0
We move all terms containing x to the left, all other terms to the right
0.1x=8.5
x=8.5/0.1
x=85
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