0. Yhtälö

• https://www.youtube.com/watch?v=y6aBm4eXd8M

11. Kahden muuttujan yhtälö

• https://www.youtube.com/watch?v=50DfKheb5A8
• https://www.youtube.com/watch?v=jNZRjztwNUk

12. Yhtälöpari

• https://www.youtube.com/watch?v=1rMRJ8XP6lA
• https://www.youtube.com/watch?v=FyAzKCYGlqA

13. Graafinen ratkaiseminen

• https://www.youtube.com/watch?v=xVJKdZwlvB8
• https://www.youtube.com/watch?v=pzVxZ_zCrdM
• https://www.youtube.com/watch?v=4r2WreDAVag
• https://www.youtube.com/watch?v=ta6YsROWvko

14. Algebrallinen ratkaiseminen

• https://www.youtube.com/watch?v=8qzC_yWjOJc
• https://www.youtube.com/watch?v=BYmmKxHpPDY
• https://www.youtube.com/watch?v=5777uIVgZAA&t=2s

15. Sovelluksia

• https://www.youtube.com/watch?v=3YaVFjmhL6c
• https://www.youtube.com/watch?v=mqOlOnJkiqw
• https://www.youtube.com/watch?v=yHTGBDAmsno
• https://www.youtube.com/watch?v=4a4L3_F_Uv4