Practice Linear System Behavior in Math

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

The classification of a system of linear equations based on the geometric relationship of the lines: intersecting at one point (one unique solution), parallel with no intersection (no solution), or coincident/overlapping (infinitely many solutions).

Two lines can cross (one solution), be parallel (no solution), or overlap (infinite solutions).

Showing a random 20 of 50 problems.

Example 1

easy
How many solutions can a system of two linear equations in two unknowns have?

Example 2

easy
A consistent and independent system has __________ solution(s).

Example 3

medium
For what k does {3x+ky=126x+8y=24 have infinitely many solutions?

Example 4

easy
Lines y=2x+1 and 2y=4x+2: classify.

Example 5

easy
Graphically, two lines coincide (lie on top of each other). The system is __________.

Example 6

hard
For what values of k does {x+ky=1kx+y=1 have a UNIQUE solution?

Example 7

easy
Two lines have the same slope but different y-intercepts. How many solutions does the system have?

Example 8

medium
Classify: {x−3y=22x−6y=7

Example 9

hard
For what k does {3x−2y=69x+ky=18 have NO unique solution?

Example 10

easy
Lines y=2x+1 and y=3x−4: same slope or different?

Example 11

medium
For what k does {x+2y=32x+ky=6 have infinitely many solutions?

Example 12

medium
For what value of k does {2x+3y=64x+6y=k have infinitely many solutions?

Example 13

medium
Classify: {2x+3y=64x+6y=12.

Example 14

easy
After elimination, a system reduces to 5=7. How many solutions?

Example 15

medium
Classify: {3x−y=46x−2y=8

Example 16

easy
Lines 2x−y=3 and 2x−y=5: classify.

Example 17

easy
Classify by graph: two lines drawn lie on top of each other. Solution count?

Example 18

medium
Classify: {x+y=4x−y=2.

Example 19

challenge
Find all a for which {x+y=2ax+y=4 has a UNIQUE solution.

Example 20

medium
Classify: {2x+3y=64x+6y=7.