 # WAEC REVISION – Equations and Inequalities ### Improve Competency with MyMathsHero

Equations and inequalities are both mathematical sentences formed by relating two expressions to each other. In an equation the two expressions are deemed equal which is shown by the symbol =. … If the statement is true the number is a solution to the equation or inequality.

In this topic, we cover the following: Linear equations, change of subject of formula, linear inequalities, simultaneous linear equations, quadratic equations, simultaneous linear and quadratic equations and word problems. At the end of this topic, students should understand the following among other things:

• Recall previous knowledge to represent inequalities in one variable on a number line,
• Solve inequalities in one variable and two variables showing required solution sets within an unshaded region on a cartesian graph, solve linear equations, change the subject of a formula, solve linear inequalities and solve simultaneous equations,
• Solve real-life problems involving restrictions using graphical methods (i.e. linear programming),
• Use linear programming to determine maximum and minimum values within a given set of restrictions,
• Solve word problem questions and simultaneous linear equation problems.

1
SS3- WAEC REVISION 1- LESSON 1A-SIMULTANEOUS EQUATION
26 Minutes
2
SS3-WAEC REVISION 1- LESSON 1B-SIMULTANEOUS EQUATION
22 Minutes
3
SS3-WAEC REVISION 2- LESSON 1A-QUADRATIC EQUATION
24 Minutes
4
SS3-WAEC REVISION 2- LESSON 1B-QUADRATIC EQUATION
18 Minutes
5
SS3-WAEC REVISION 4- LESSON 2A-QUADRATIC EQUATIONS
32 Minutes
6
SS3-WAEC REVISION 4- LESSON 2B-QUADRATIC EQUATIONS
19 Minutes
7
SS3-WAEC REVISION 3- LESSON 1A-INEQUALITIES
19 Minutes
8
SS3-WAEC REVISION 3- LESSON 1B-INEQUALITIES
10 Minutes

### REVISION LESSON-SOLVED EXAM QUESTIONS

1
EQUATION & INEQUALITIES OBJECTIVE 1
3
2
EQUATION & INEQUALITIES OBJECTIVE 2
3
EQUATION & INEQUALITIES OBJECTIVE 3
2 Minutes
4
EQUATION & INEQUALITIES OBJECTIVE 4
1 Minute
5
EQUATION & INEQUALITIES OBJECTIVE 5
6
EQUATION & INEQUALITIES OBJECTIVE 6
1 Minute
7
EQUATION & INEQUALITIES OBJECTIVE 7
1 Minute
8
EQUATION & INEQUALITIES OBJECTIVE 8
2 Minutes
9
EQUATION & INEQUALITIES OBJECTIVE 9
2 Minutes
10
EQUATION & INEQUALITIES OBJECTIVE 10
1 Minute
11
EQUATION & INEQUALITIES OBJECTIVE 11
2 Minutes
12
EQUATION & INEQUALITIES OBJECTIVE 12
2 Minutes
13
EQUATION & INEQUALITIES OBJECTIVE 13
3 Minutes
14
EQUATION & INEQUALITIES OBJECTIVE 14
2 Minutes
15
EQUATION & INEQUALITIES OBJECTIVE 15
3 Minutes
16
EQUATION & INEQUALITIES OBJECTIVE 16
4 Minutes
17
EQUATION & INEQUALITIES OBJECTIVE 17
1 Minute
18
EQUATION & INEQUALITIES OBJECTIVE 18
1 Minute
19
EQUATION & INEQUALITIES OBJECTIVE 19
1 Minute
20
EQUATION & INEQUALITIES OBJECTIVE 20
2 Minutes
21
EQUATION & INEQUALITIES OBJECTIVE 21
1 Minute
22
EQUATION & INEQUALITIES OBJECTIVE 22
3 Minutes
23
EQUATION & INEQUALITIES OBJECTIVE 23
1
24
EQUATION & INEQUALITIES OBJECTIVE 25
3 Minutes
25
EQUATION & INEQUALITIES OBJECTIVE 26
1 Minute
26
EQUATION & INEQUALITIES OBJECTIVE 27
2 Minute
27
EQUATION & INEQUALITIES OBJECTIVE 28
2 Minutes
28
EQUATION & INEQUALITIES OBJECTIVE 29
2 Minutes
29
EQUATION & INEQUALITIES OBJECTIVE 30
2 Minutes

### REVISION LESSON-SOLVED EXAM QUESTIONS (THEORY)

1
Topic 4- EQUATION & INEQUALITIES-(THEORY QUEST 35)
3 Minutes
2
Topic 4- EQUATION & INEQUALITIES-(THEORY QUEST 36)
5 Minutes
3
Topic 4- EQUATION & INEQUALITIES-(THEORY QUEST 37)
1 Minute
4
Topic 4- EQUATION
1 Minute
5
Topic 4- EQUATION
3 Minutes
6
Topic 4- EQUATION
7 Minutes
7
Topic 4- EQUATION
4 Minutes
8
Topic 4- EQUATION
4 Minutes
9
Topic 4- EQUATION
4 Minutes
10
Topic 4- EQUATION & INEQUALITIES-(Theory Question 44)
6 Minutes