Question

Solve the simultenues equation

Xy=4
X+y=5

Answer 1

xy=4
x+y=5
x=5-y
(5-y)y=4
5y-y²=4
y²-5y=4
-5+√25-4×1×4
-5+√9/2×1
y=4
x+4=5
x=1

Answer 2

X=1
Y=4

Answer 3

Y=4
X=1