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4=x/5.12
We move all terms to the left:
4-(x/5.12)=0
We add all the numbers together, and all the variables
-(+x/5.12)+4=0
We get rid of parentheses
-x/5.12+4=0
We multiply all the terms by the denominator
-x+4*5.12=0
We add all the numbers together, and all the variables
-1x+20.48=0
We move all terms containing x to the left, all other terms to the right
-x=-20.48
x=-20.48/-1
x=20+0.48/1
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