Answer :
The equation(s) are the following:
16x+10y=400
X+y=28
(The scented)X=20
(The unscented)Y=8
16x+10y=400
X+y=28
(The scented)X=20
(The unscented)Y=8
x=scented
y=unscented
x+y=28
x=28-y
16x+10y=400
16 (28-y)+10y=400
148-16y+10y=400
148-6y=400
-6y=252
y=-42
y=unscented
x+y=28
x=28-y
16x+10y=400
16 (28-y)+10y=400
148-16y+10y=400
148-6y=400
-6y=252
y=-42