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Still Confused?

Try reviewing these fundamentals first.

Still Confused?

Try reviewing these fundamentals first.

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Get Started NowStart now and get better math marks!

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Get Started Now- Intro Lesson2:12
- Lesson: 14:11
- Lesson: 24:35
- Lesson: 35:50

Basic concepts: Solving systems of linear equations by substitution,

Related concepts: Solving 3 variable systems of equations by elimination, Solving 3 variable systems of equations with no or infinite solutions,

- IntroductionHow to Solve Three Variable Systems of Equations?
- 1.
**Solving Three Variable Systems of Equations – (Easy)**Solve the following system of equations by substitution:

$2x + 3y + 4z = 0$

$2y + 3z = 23$

$z = 5$

- 2.
**Solving Three Variable Systems of Equations – (Medium)**Solve the following system of equations by substitution:

$3x - 5y + z = 0$

$x - 2y - z = 0$

$z = -2$

- 3.
**Solving Three Variable Systems of Equations – (Hard)**Solve the following system of equations by substitution:

$15x + 7y - 6z = -9$

$5x - 3y + 6z = 13$

$z = 4$

17.

Simultaneous Equations

17.1

Determining number of solutions to linear equations

17.2

Solving simultaneous linear equations by graphing

17.3

Solving simultaneous linear equations by elimination

17.4

Solving simultaneous linear equations by substitution

17.5

Money related questions in linear equations

17.6

Unknown number related questions in linear equations

17.7

Distance and time related questions in linear equations

17.8

Rectangular shape related questions in linear equations

17.9

Simultaneous linear-quadratic equations

17.10

Simultaneous quadratic-quadratic equations

17.11

Solving 3 variable simultaneous equations by substitution

17.12

Solving 3 variable simultaneous equations by elimination

17.13

Solving 3 variable simultaneous equations with no solution, infinite solutions

17.14

Word problems relating 3 variable simultaneous equations