Pair of Linear Equations, Part 2: Solving algebraically
Graphs show the idea; algebra gives the exact answer.
In this lesson you will
- Solve a pair of linear equations by substitution
- Solve a pair of linear equations by elimination
- Recognise no solution or infinitely many solutions during elimination
- Model money, age, number and mixture problems as a pair of equations
- Interpret and check solutions in the context of the problem