Question

4 upon X + 5 upon Y is equal to 4 solve the equation​

Answer 1

x+y=4 is the condition after solving it .

Answer 2

$\frac{4}{x} + \frac{5}{y} = 4$

$\frac{4y + 5x}{xy} = 4$

$5x + 4y = 4xy$