.50 - x / x = 3.20e-1

I need to solve for x. I was going to do .50 X 3.20e-1 and then take the square root but this is not correct. I am not sure what to do. Thank you for your help.

You probably meant

(.50 - x)/x = 3.2 e^-1= 3.2/e
crossmultiply ...
.50 - x = (3.2/e)x
(3.2/e)x + x = .5
x(3.2/e + 1)
x = .5/(3.2/e + 1)
multiply by e/e
= .5e/(3.2 + e)
multiply by 10/10
= 5e/(32 + 10e)

So I have to multiply 5e by 10 which would be 50e and then multiply (32+10e) by 10?

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1. Hannah: Professor Reiny solved it for you.

x= 10e/(32+10e)

calculate that. Or if you cant, put this in your google search window

10*e/(32+10*e) =

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posted by bobpursley

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