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0.8x-0.1x=0.9x
We move all terms to the left:
0.8x-0.1x-(0.9x)=0
We add all the numbers together, and all the variables
0.8x-0.1x-(+0.9x)=0
We add all the numbers together, and all the variables
0.7x-(+0.9x)=0
We get rid of parentheses
0.7x-0.9x=0
We add all the numbers together, and all the variables
-0.2x=0
x=0/-0.2
x=0
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