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Example 3.31 from Elementary Algebra, 3.3 Solve Mixture Applications
Solve Mixture Applications: example 3.31
Monica paid $8.36 for stamps. The number of 41-cent stamps was four more than twice the number of two-cent stamps. How many 41-cent stamps and how many two-cent stamps did Monica buy?
Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.
Solution
The types of stamps are 41-cent stamps and two-cent stamps. Their names also give the value!
“The number of 41-cent stamps was four more than twice the number of two-cent stamps.”
Write the equation from the total values. Solve the equation. Monica bought eight two-cent stamps. Find the number of 41-cent stamps she bought be evaluating. Check. Monica bought eight two-cent stamps and 20 41-cent stamps. Table 3.9
Your turn
The book's Try It right after this example: same idea, new numbers. Only the answer is given.
Eric paid $13.36 for stamps. The number of 41-cent stamps was eight more than twice the number of two-cent stamps. How many 41-cent stamps and how many two-cent stamps did Eric buy?
How did it go?