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Question 1206084: If z= x-8 divided by 2x, then x =
Found 3 solutions by MathLover1, Theo, ikleyn:
Answer by MathLover1(20849)   (Show Source):
Answer by Theo(13342)  (Show Source):
You can put this solution on YOUR website! start with z = (x-8)/2x
multiply both sides of the equation by 2x to get:
2xz = x-8
subtract x from both sides of the equation to get:
2xz - x = -8
factor out the x on the left side of the equation to get:
x * (2z-1) = -8
divide both sides of the equation by (2z-1) to get:
x = -8/(2z-1)
that's your solution.
to confirm, take any random value for x and solve for z in z = (x-8)/(2x).
i used x = 3000.
you will get z = .4986666667.
now, take z = .4986666667 and solve for x in x = -8/(2z-1) to get z = 3000.
this confirms the equation for x is good.
your original equation was z = (x-8)/2x.
your solution is x = -8/(2z-1).
Answer by ikleyn(52781)  (Show Source):
You can put this solution on YOUR website! .
Hey, from your post (actually, from BOTH your posts), I see that you are not able to write mathematical problems properly.
You should use PARENTHESES to show which part of the formula is the numerator and which is the denominator, like this
z = (x-8)/(2x).
Then everything is clear and we can work with it.
Otherwise, we only can guess what do you want.
It is an elementary mathematical grammar, by the way.
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