Attention! This example already works as expected in Wolfram Mathematica 12.1.1.0 for function Solve
.
The problem was in version 12.1.0.0. Check out answer of Bob Hanlon for more information here.
Original question
I am using Wolfram Mathematica 12.1.0.0. I want to solve a system of two equations. I want to get only real solutions.My questions are:
Where is the solution $(x,y)=(0,2)$?
How to get this solution?
f[x_, y_] := y + 2*4^(x + y - 1) - 10;g[x_, y_] := 4/(2*y - 3)^(1/2) + 2^(2 - x - y) - 5;Solve[{f[x, y] == 0, g[x, y] == 0}, {x, y}, Reals]
{{x -> -(19/2), y -> 19/2}}
NOTE
I recommend you read how Artes changes the variables here. This is a mathematical approach to solving a software problem.