Functions and More Functions - Beginning Pre-Calculus for Game Developers - page 89

To check this solution, you substitute it back into the original equation:

3 x þ 2
7 ¼ 4

þ 2

26
3

3

¼ 4 Substituting the value for x :

7

78
3 þ 2

7 ¼ 4

:

Divide 78 by 3

26 þ 2
7 ¼ 4

Add 26 and 2 :

28
7 ¼ 4

Divide 28 by 7 :

4 ¼ 4 The solution is correct :

Exercise Set 5.3

a. 3x

2 ¼ 60 10

b. 4x

1
2 ¼ 42

2 þ 3

c. 6x

2 4 ¼ 30
d. 6b
2

4 12 ¼ 2

5
6 ¼

7
8

e. y

1
3 ¼

8
3

f. b þ

g. 1

3
8 ¼

5
8

8 þ s þ

1
5 þ e ¼

1
4

h.