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((10x-5)/10x)=0.8
We move all terms to the left:
((10x-5)/10x)-(0.8)=0
Domain of the equation: 10x)!=0We add all the numbers together, and all the variables
x!=0/1
x!=0
x∈R
((10x-5)/10x)-0.8=0
We multiply all the terms by the denominator
((10x-5)-(0.8)*10x)=0
We calculate terms in parentheses: +((10x-5)-(0.8)*10x), so:We get rid of parentheses
(10x-5)-(0.8)*10x
We multiply parentheses
(10x-5)-8x
We get rid of parentheses
10x-8x-5
We add all the numbers together, and all the variables
2x-5
Back to the equation:
+(2x-5)
2x-5=0
We move all terms containing x to the left, all other terms to the right
2x=5
x=5/2
x=2+1/2
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