If I have the two equations y=ax and x=u-y where y is the output and u is the input, how can I get Mathematica to combine these two equations to get the single equation, y = (a/(1+a))u?Thanks.
Ok. That worked. Thanks.
Thank you.
Solve[Eliminate[{y==a x,x==u-y},x],y] {{y -> (a*u)/(1 + a)}}
