Page 135 - Basic College Mathematics with Early Integers

112 C HAPTE R 2 I INTEGERS AND INTRODUCTION TO VARIABLES

PRACTICE 6 Example 6 Write each as an algebraic expression. Use x to represent
Write each as an algebraic “a number.”
expression. Use x to represent
“a number.” a. 7 increased by a number.
a. Twice a number. b. 15 decreased by a number.
b. 8 increased by a number. c. The product of 2 and a number.
c. 10 minus a number. d. The quotient of a number and 5.
d. 10 subtracted from a number. e. 2 subtracted from a number.
e. The quotient of a number Solution:
and 16.
a. In words: 7 increased by a number
Translate: 7 + x

b. In words: 15 decreased by a number
Translate: 15 - x

The product
c. In words:
of

2 and a number
T
Translate: 2 # x or 2x

The quotient
d. In words:
of

a number and 5
T x
Translate: x , 5 or
5

subtracted
e. In words: 2 a number
from

∂
Translate: x Î - Î 2

Work Practice 6

Remember that order is important when subtracting. Study the order of numbers
and variables below.
Phrase Translation

a number decreased by 5 x - 5
a number subtracted from 5 5 - x Copyright 2012 Pearson Education, Inc.

Answers
6. a. 2x b. 8 + x c. 10 - x
x
d. x - 10 e. x , 16 or
16