Question

Solve simultaneous equation
XY=4
X+Y=5

Answer 1

3

Answer 2

X=5-Y
(5-y)y=5
5y-y²=5
5y+y²+5=0
Y²+5y+5=0
S=5
P=5

Answer 3

x+y=5
Let x=5-y
xy=4 then be
(5-y)y=4
after this you use the completing square method
and get your answer as:
y=4
x=1

Answer 4

Y=4
X=1

Answer 5

When x=4,Then y=1
When x=1,Then y=4

Answer 6

22

Answer 7

X=4 
Y=1