SaiBook.us Algebra

Example

Title: Adding and Subtracting Variables

Grade: 6-a Lesson: S2-L6

Explanation: The best way to understand algebra is by looking at some examples. Take turns and read each example for easy understanding.

Examples:

Simplify the expression 4y + 2x - 7y + 3x.

Step 1a

Given expression is 4y + 2x - 7y + 3x

Combine like terms (4y - 7y) + (2x + 3x)

⇒ -3y + 5x
Simplified the expression -3y + 5x.

Explanation: After combining like terms and simplifying the expression, we get -3y + 5x.

Simplify the expression 3(x + 2) − 2(2x − 1).

Step 2a

Given expression is 3(x + 2) − 2(2x − 1)

Expand the expression 3x + 6 - 4x + 2

Evaluate the expression (3x - 4x) + (6 + 2)

⇒ -x + 8
Simplified the expression -x + 8.

Explanation: After expanding and evaluating the expression, we arrived at the simplified form of -x + 8.