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(x-21)/x=0.50
We move all terms to the left:
(x-21)/x-(0.50)=0
Domain of the equation: x!=0We add all the numbers together, and all the variables
x∈R
(x-21)/x-(0.5)=0
We add all the numbers together, and all the variables
(x-21)/x-0.5=0
We multiply all the terms by the denominator
(x-21)-(0.5)*x=0
We multiply parentheses
(x-21)-0.5x=0
We get rid of parentheses
x-0.5x-21=0
We add all the numbers together, and all the variables
0.5x-21=0
We move all terms containing x to the left, all other terms to the right
0.5x=21
x=21/0.5
x=42
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