\(\frac{5}{3} \times \frac{10}{3} \\ \\ \frac{5 \times 10}{3 \times 3} \\ \\ \frac{50}{3 \times 3} \\ \\ \frac{50}{9} \\ \\ 5 \frac{5}{9} \\ \\ Answer: \fbox {5 5/9} \ or \ \fbox {5.5556} \\ \\ ----------- \\ \\ (8 + 7a) + 4 \\ \\ 8 + 7a + 4 \\ \\ 7a + 12 \\ \\ Answer: \fbox {12 + 7a}\)
