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Sections

Pair of Linear Equations in Two Variables

Pick a section. You read the idea first, then answer questions on it.

1. Where two lines meet1 ideaRead
2. Before you start1 ideaRead
3. One equation, one line, endless solutions1 ideaRead
4. Consistent, inconsistent, dependent1 ideaRead
5. Naming the three ratios of a pair1 ideaRead
6. The graphical method: plot, then read1 ideaRead
7. Unequal first two ratios: one solution1 ideaRead
8. First two equal, third not: no solution1 ideaRead
9. All three ratios equal: infinite solutions1 ideaRead
10. The substitution method, step by step1 ideaRead
11. The elimination method, step by step1 ideaRead
12. Turning words into a pair of equations1 ideaRead
13. No solution is not the same as infinite1 ideaRead
14. Same signs subtract, opposite signs add1 ideaRead
15. Worked: solving by the graphical method1 ideaRead
16. Worked: classifying three pairs by ratio1 ideaRead
17. Worked: solving by substitution1 ideaRead
18. Worked: solving by elimination1 ideaRead
19. Worked: elimination finds infinite solutions1 ideaRead
20. Worked: a situational problem, solved1 ideaRead
21. Recap1 ideaRead
22. Where you will meet this1 ideaRead
23. Practice set: Exercise 3.11 ideaRead
24. Practice set: Exercise 3.21 ideaRead
25. Practice set: Exercise 3.31 ideaRead