Lesson 2 of 4 · Grade 9 Mathematics
Simultaneous linear equations
18 min
Two equations with two unknowns solved together.
Elimination method
x + y = 10 ... (1)
x - y = 4 ... (2)
Add (1) and (2): 2x = 14 → x = 7. Substitute: 7 + y = 10 → y = 3.
Substitution method
Continue reading this lesson
Create a free account to read the full notes, try the quizzes and games, and join live classes. 3-day free trial.
