Solve the pair of simultaneous equations:
x+y=2xy
x-y=xy
I solved it to get x=2 and y=0.66
but the answer booklet says it is wrong?
can someone please explain
You have two equations: 1) x+y = 2xy 2) x-y =xy
In the first equation make y the subject. This gives you your third equation 3) y = 2xy-x > simplify > y = x(2y-1)
Sustitute this 3rd equation into the 2nd equation and solve it simultaneously.
I get x = 2x(2y-1) and y = -2x(y-1) Hope this helps! :-)