ANSWER: Well, if the total cost is $10.00 and the wine is worth $9.00 more than the bottle, you might be quick to say that the value of the bottle is $1.00. You would be wrong. Let me explain:
Think of it as an algebraic equation where X is the value of the bottle.
Bottle = X
Wine = X + 9 (because it’s worth $9 more than the bottle)
X + (X+9) = 10
2X + 9 = 10
2X = 10 – 9 = 1
2X = 1
Ergo: X = 0.5 (50 cents)
So the bottle is worth $0.50 and the wine is worth $9.50.