1. Suppose a friend has just given you $25. This increased your total amount of
cash to $45. How much money did you start with?
Step 1: Define the variable. (Hint: The variable shown is the first letter of the
word it defines.) (2 points)
m =
Step 2: Write an equation to describe the situation using the variable defined
in Step 1. (2 points)
Step 3: Solve the equation you wrote in Step 2. (Hint: Use the reverse
operation performed to m.) Show your work. (2 points)
Step 4: Explain the solution you found in Step 3. (2 points)