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0=x-0.3x
We move all terms to the left:
0-(x-0.3x)=0
We add all the numbers together, and all the variables
-(+0.7x)+0=0
We add all the numbers together, and all the variables
-(+0.7x)=0
We get rid of parentheses
-0.7x=0
x=0/-0.7
x=0
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