Determining number of solutions to linear equations

Intro Lesson
9:21
Lesson: 1
3:40
Lesson: 2
3:33

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Determining number of solutions to linear equations

Depending on whether and how the linear equations in a system touch each other, there will be different number of solutions to the system. There can be one solution, no solution and even infinite solution.

Basic Concepts: Slope equation:

m = \frac{y_2-y_1}{x_2- x_1}

, Slope intercept form: y = mx + b, Parallel line equation

Lessons

Introduction
$\bullet$ The solutions to a system of equations are the points of intersection of the graphs.
$\bullet$ For a system consisting of two linear equations:
There are 3 cases to consider:

1.
State whether each of the following systems have ONE, NONE, or INFINITE solutions

i) 3x + y = 7
4x + y = 7

ii) 6x + 2y = 10
3x + y = 5

iii) x - y = 3
3x - 3y = 6

2.
Find a value for c that will give the following system:
3y + 2cx = 6
y - 6x = 0

i) one solution

ii) no solutions

Determining number of solutions to linear equations

Determining number of solutions to linear equations

Lessons

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Practice topics for Simultaneous Equations