Thread: solving for two unknowns?

Hello there need a bit of help in solving an equation to find two unknowns. the equation is




i need to find the values for x and y what i cant work out is how to isolate them and how to find 2 unknowns.

A= 5cm^2
Z= 75mm
x+y = 100mm
Kc= 2500 Newtons per Ampere
Po is in bar and is 0.2 at 4mA
Iin is in mA and is 4 at 0.2Bar
all units must be in SI

any help greatly appreciated. Thanks ian

x + y = 100mm
So y = 100mm - x

Substitue this for y.
Solve for x.

Are you given what is?

If so:




substitute this in for x, and solve for y.

If you're not given what is, then you actually have 3 unknowns, with 2 equations and you cannot solve for x or y.

thank you for the replies and help
i can see what i need to do
i have been transforming that equation all week but im obviously not doing it right i need to speak to my tutor im miising basic maths here

thanks again