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0.4=x-100/20
We move all terms to the left:
0.4-(x-100/20)=0
We add all the numbers together, and all the variables
-(x-5)+0.4=0
We get rid of parentheses
-x+5+0.4=0
We add all the numbers together, and all the variables
-1x+5.4=0
We move all terms containing x to the left, all other terms to the right
-x=-5.4
x=-5.4/-1
x=5+0.4/1
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