Now that we know how to solve systems of equations with two variables, we’ll just let n be the number of nickels and d be the number of dimes. We had to decide if we were going to let n be the number of nickels and then write the number of dimes in terms of n, or if we would let d be the number of dimes and write the number of nickels in terms of d. Using one variable meant that we had to relate the number of nickels and the number of dimes. For a coin example with nickels and dimes, the table looked like this: When we solved mixture applications with coins and tickets earlier, we started by creating a table so we could organize the information. Mixture application involve combining two or more quantities. If you missed this problem, review Example 2.20. ![]() ![]() ![]() Earl’s dinner bill came to $32.50 and he wanted to leave an 18% tip.
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