1. Inequalities What are the meanings of these symbols?
Algebra
Inequalities
What are the meanings of these symbols?
Symbol
Meaning
Number Line Symbol
Greater than
Less than
Greater than or
equal to
Less than or

2. Algebra
Inequalities
On a number line the symbol is drawn to show the inequality:
x , 3, 4, 5 etc 1 2 3 4 -1 -2 -3 -4

3. Algebra
Inequalities
On a number line the symbol is drawn to show the inequality:
x , 3, 4, 5 etc 1 2 3 4 -1 -2 -3 -4

4. Algebra
Inequalities
On a number line the symbol is drawn to show the inequality:
x , -1, 0, 1 etc 1 2 3 4 -1 -2 -3 -4

5. Algebra
Inequalities
On a number line the symbol is drawn to show the inequality:
x , -1, 0, 1 etc 1 2 3 4 -1 -2 -3 -4

6. Algebra Solving inequality equations.
Treat the equations as if the symbol were a normal = sign:
3x + 4 = 16
3x =
3x = 12
3x ÷ 3 = 12 ÷ 3
Finally replace the original symbol
Now plot the correct inequality symbol on a number line
x = 4

7. Solving inequality equations.
Algebra
Solving inequality equations.
x 4 1 2 3 4 -1 -2 -3 -4