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2/5x-0.86=0.54
We move all terms to the left:
2/5x-0.86-(0.54)=0
Domain of the equation: 5x!=0We add all the numbers together, and all the variables
x!=0/5
x!=0
x∈R
2/5x-1.4=0
We multiply all the terms by the denominator
-(1.4)*5x+2=0
We multiply parentheses
-7x+2=0
We move all terms containing x to the left, all other terms to the right
-7x=-2
x=-2/-7
x=2/7
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