Table of Contents

Example 1 :
Exercises:
Example 2 :
1. Solve the following equations:
(a) 4x = 20
(b) 6x = 24
(c) x
3
(d) x
5
= 5
= 1.2
(e) 2x = 11
x
3
x
× 3
3
=
=
2 becomes
2 × 3 multiplying both sides by 3
x = 6
2
x
7
7 ×
= 4
2
x
7
2x
=
=
4 × 7
28
(multiplying both sides by 7)
2x
2
=
28
2
(dividing both sides by 2)
x = 14
(f) 3x = −24
(g) x
2
(h) 3x
4
(i) 2
5
(j) 3m
4
= −7
= −12
m = 10
= −6
Section 3 Multiple Terms
The puzzle page in the newspapers sometimes has puzzles like this example:
Example 1 : Jean is 7 years older than half of Tom’s age. If Jean is 35, how old is
Tom? We now write the information that we are given in the form of an algebraic
expression. Let Jean’s age be J and Tom’s T . Then
J = 1
T + 7
2
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