I just cant solve for this unknow, could anyone guild me?

[kritbordin]

I just can't solve for this unknow, could anyone guild me? please

Homework Statement

It is a problem about VLE from i already found almost everything cept this 2 unknowns i can't solve I need to find A and B but it seems hard to me or i did something wrong

Homework Equations

Original)
(1)-------- 0.32=A+lnB
(2)-------- 0.51=lnA+B

The Attempt at a Solution

This is what i have so far
(1)---------- exp(.32)=exp(A)+B = 1.377
(2)---------- exp(.51)=A+exp(B) = 1.665

T_T It confused me. - -

 

[sara_87]

you made a mistake when taking exponentials of both sides.
so your equations are:
0.32=A+lnB
0.51=lnA+B

when taking exponentials, this gives:
exp(0.32)=exp(A+lnB)=exp(A)*exp(lnB)=B*exp(A)

can you do the rest now?

 

[iamthegelo]

Homework Statement

It is a problem about VLE from i already found almost everything cept this 2 unknowns i can't solve I need to find A and B but it seems hard to me or i did something wrong

Homework Equations

Original)
(1)-------- 0.32=A+lnB
(2)-------- 0.51=lnA+B

The Attempt at a Solution

This is what i have so far
(1)---------- exp(.32)=exp(A)+B = 1.377
(2)---------- exp(.51)=A+exp(B) = 1.665

T_T It confused me. - -

RHS is wrong remember exp(A + B) = exp(A) * exp(B) remember the rules for exponents.

 

[Cyosis]

While your manipulations were incorrect even if you do them correctly you still won't be able to solve this algebraically. Seeing as you have decimal values you could try using a graphical calculator to obtain a decimal result.

 

[Mark44]

I'm having trouble deciphering your post title. Did you mean you wanted someone to gild you? geld you?

Oh, now I get it. You wanted someone to guide you.