Judy needs 514 quarts of oil to change the oil in her car. She has 212 quarts in one bottle and 114 quarts in another. How many more quarts of oil does Judy need to change the oil in her car?

1. ∠1 is complementary to ∠2 and ∠3 is complementary to ∠2. subtraction property of equality 2. m∠1 + m∠2 = 90 and m∠3 + m∠2 = 90 substitution 3. m∠1 + m∠2 = m∠3 + m∠2 definition of complementary 4. m∠1 = m∠3 given