Title
Lucky Find
Problem Statement
Karen found $2 on the
sidewalk. "Wow!" said Karen. "Now I have five times as much
as I would have had if I had lost $2!" How much money did Karen have
before she found the $2?
Problem setup
Determine the original amount
of money Karen possessed. If
she adds $2 to her original amount, she now has 5 times more than she would
have if she had lost $2.
Plans to
Solve/Investigate the Problem
Think of an equation. After finding $2, her amount is
equal to 5 times what she would have had if $2 were lost.
Investigation/Exploration
of the Problem
Start with a variable: x
x = original amount
Set up equation:
Original amount + amount
found = 5 times (original amount – amount lost)
x + $2 = 5 (x  $2)
Solve equation: x + 2 = 5x 10
+10 = x
12 = 4x
3 = x
Check solution:
3 + 2 = 5 (3 – 2)
5 = 5 (1)
5 = 5
Author & Contact
LLaster
llaster@rockdale.k12.ga.us
Link(s) to resources, references, lesson plans, and/or other
materials
Link 1
Link 2
