# Question:plot of system of equations

## Question:plot of system of equations

Maple 2016

Hi

I have a system of equations (4) which I would like to plot in regards to a fifth variable. Is there a good way to do this. Some of the solutions would end up as negative values, which is not an option I am interested in having.

C__A is my variable, and the other variables I would like to solve are tau,C__B,C__C,C__D. Im specifically interested in tau with regards to C__A. I hope this makes sense :)

regards

C__A := .75;
0.75

a := tau = (C__A0-C__A)/(-r__A);
0.75
tau = - ------------------------------------------------
2
-0.00900 C__B + 0.03500000000 C__C  - 0.075 C__C
b := tau = (C__B0-C__B)/(-r__B);
2 - C__B
tau = - -----------------------------------
2
-0.00900 C__B + 0.03500000000 C__C
c := tau = (C__C0-C__C)/(-r__C);
C__C
tau = ---------------------------------------
2
0.01800 C__B - 0.070 C__C  - 0.075 C__C
d := tau = (C__D0-C__D)/(-r__D);
13.33333333 C__D
tau = ----------------
C__C
sol := fsolve([a, b, c, d], {C__B = 1, C__C = .2, C__D = .2, tau = 50});

{C__B = 1.673672109, C__C = 0.2289836744, C__D = 0.4236721086,

tau = 24.66971264}

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