Hi;
I have these equations 5/x - 2/y = 2 and 2/x + 3/y = 16.
Unfortunatly I have no work to show because I don't know where to start with unknows on the bottom.
Thanks
Do you have to solve a system? Or are the two equations totally independent of each other? (I think the first one)
In case you mean a sytem it can be useful to do a substitution, let and let (and ), solve the system for a and b and afterwards do the back-substitution.
What do you mean with that?
, because else you're diving by zero which is offcourse not possible (undefined).
EDIT:
If you use 'Plato's method' then make the sum of the two equations in the system therefore you'll get an equation in one variable which you can solve directly.
I will give you my solution:
Let and let therefore you can write the equation as:
If we substitute in one of the equations:
Back-substitution:
If
You can check your solutions by entering them into the sytem.