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1-a=0.80
We move all terms to the left:
1-a-(0.80)=0
We add all the numbers together, and all the variables
-a+1-(0.8)=0
We add all the numbers together, and all the variables
-1a+0.2=0
We move all terms containing a to the left, all other terms to the right
-a=-0.2
a=-0.2/-1
a=0.2/1
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