Lesson 2, Topic 4
In Progress

# Substitution into an Algebraic Expression

Lesson Progress
0% Complete

#### Topic Content:

• Substitution into an Algebraic Expression

Substitution into an algebraic expression is the process of replacing a letter with a number, in a given algebraic expression. The letters are called variables because they can be replaced by any value.

### Example 2.4.1:

IfÂ  x =Â  2Â  and yÂ  =Â  3Â Â Â Â

Find the following:

i. $$\scriptsize x \: + \: 6$$
ii. $$\scriptsize 4 \: + \: x \: + \: y$$
iii. $$\scriptsize y \: – \: x$$
iv. $$\scriptsize 10 \: – \: 2y \: – \: 3$$

Solution

i. $$\scriptsize x + 6 \\ = \scriptsize 2 + 6 \\ = \scriptsize 8$$

You are viewing an excerpt of this Topic. Subscribe Now to get Full Access to ALL this Subject's Topics and Quizzes for this Term!

Click on the button "Subscribe Now" below for Full Access!

### Subscribe Now

Note: If you have Already Subscribed and you are seeing this message, it means you are logged out. Please Log In using the Login Button Below to Carry on Studying!