Question

Xy=24
X=y-2
So confusing?

Answer 1

X=4 or -6 and y= 6 or -4

(4,6),(-6-4)

Explanation:

Xy=24 -------(i)

X=y-2 ---------(ii)

substitute (ii) into (i)

=> (y-2)y=24

y²-2y=24

y²-2y-24=0

(y-6)(y+4)=0

=> y= 6 or y=-4

when y=6;

X=6-2=4

when y=-4;

X= -4-2=-6