Question

x^2-x=3 and x^2+5=4x

Answer 1

Are you trying to solve simultaneous equations?

Answer 2

If you want find what values for X solve both equations then you are going to have to use the quadratic formula

Answer 3

set both equations equal to 0
x^2-x-3 =0
x^2 -4x+5=0
Now set them equal to each other to solve for x
x^2-x-3 = x^2 -4x+5
combine like terms
3x = 8
x = 8/3