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Applications of Solving Inequalities a la Shmoop.
'Tis the season to ask girls to prom. The athletes ask their girls at the basketball
game. The musicians compose songs and play them
in front of the classroom. The artsy types paint pictures of roses.
Bobby doesn't fit into any of those categories, but he wants to come up with a clever way
to ask the love of his life, Kathy, to prom. Knowing that she is fascinated by anything
with numbers, Bobby writes her a card and puts it on her desk before math class.
No fancy pictures, no sappy songs. Just a simple card.
The card reads: "9x minus 7i greater than 3 times 3x minus 7u. Bobby."
Kathy sits down in her seat as she usually does right when the bell rings...and opens
the card. On the right side of the inequality, she distributes
the 3 to the 3x minus 7u, leaving 9x minus 21 u on the right side.
Subtracting 9x from both sides, she gets negative 7i greater than negative 21 u.
Dividing both sides by a negative 1, she remembers to flip the inequality sign the other way...
...getting 7i less than 21 u. She then divides both sides by 7, to get i