Solving two simultaneous differential equations and need to plot them wrt to time .

Hello all,

I am currently trying to solve two simultaneous equations and they are dependent on multiple variables . I could not solve them and simultaneously and also have to use the output of them to make an input for other and try to iterate and optimise it . I have removed all the units as I was facing problem with a couple of them . so just I m working with plain numbers .

Can some one please help me ..

I am kind of on intermediate level in mathcad prime

Nitin