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30=0.8x
We move all terms to the left:
30-(0.8x)=0
We add all the numbers together, and all the variables
-(+0.8x)+30=0
We get rid of parentheses
-0.8x+30=0
We move all terms containing x to the left, all other terms to the right
-0.8x=-30
x=-30/-0.8
x=37+0.4/0.8
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