Chapter 2: Q7. (page 64)

Simplify the expression.
$4 + x + (- 1)$

Short Answer

Expert verified

$4 + x + (- 1) = x + 3$ .

Step by step solution

Step-1 – What are real numbers?

Real numbers are simply the combination of Whole numbers, Integers, Rational and Irrational numbers in the number system.

Step-2 – Commutative Property of Addition of Real Numbers:

Suppose a, b, and c is three real numbers.

Commutative Property of Addition:

Property: a + b = b + a

If you add two real numbers in any order, the sum will always be the same.

Example: 5 + 2 = 2 + 5 = 7

Step-3 – Evaluate the expression

Commutative property of Addition states, if you add two real numbers in any order, the sum will always be the same.

Evaluate the expression:

To evaluate the expression $4 + x + (- 1)$ , the term\[y\]is a variable.

The terms 4and (– 1) are constants.

Using the Commutative property of addition, adding like terms,

$\begin{array}{l} 4 + x + (- 1) \\ 4 + x - 1 [+ (- 1) = - 1] \\ x + (4 - 1) \\ x + (- 1 + 4) (CommutativePropertyofAddition) \\ x + 3 \end{array}$

$4 + x + (- 1) = x + 3$

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Simplify the expression.
$4 + x + (- 1)$

Short Answer

Step by step solution

Step-1 – What are real numbers?

Step-2 – Commutative Property of Addition of Real Numbers:

Step-3 – Evaluate the expression

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Statistics

Geometry

Pure Maths

Decision Maths

Mechanics Maths

Applied Mathematics

Study anywhere. Anytime. Across all devices.

Simplify the expression.4+x+(-1)

Short Answer

Step by step solution

Step-1 – What are real numbers?

Step-2 – Commutative Property of Addition of Real Numbers:

Step-3 – Evaluate the expression

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Statistics

Geometry

Pure Maths

Decision Maths

Mechanics Maths

Applied Mathematics

Study anywhere. Anytime. Across all devices.

Simplify the expression.
$4 + x + (- 1)$