Exploring Adding and Subtracting Rational Expressions

This video tutorial covers solving one-step equations using addition and subtraction. It begins by defining equations and variables, then demonstrates solving equations through mental math. The concept of inverse operations is introduced, explaining how they are used to solve equations. The video further explores the addition and subtraction properties of equality, providing examples and emphasizing the importance of checking work to ensure accuracy.

What is a variable in the context of equations?

• A known quantity

• A mathematical statement

• An unknown quantity represented by a letter

• A number that is always positive

Which letter is commonly used as a variable in equations?

• B

• A

• X

• O

What is the inverse operation of addition?

• Multiplication

• Division

• Addition

• Subtraction

If you have the equation X - 2 = 7, what is the value of X?

• 5

• 7

• 9

• 11

In the equation 6 + K = 8, what is the value of K?

• 4

• 3

• 2

• 1

What is the result of adding the same number to both sides of an equation?

• The equation becomes more complex

• The variable disappears

• The two sides remain equal

• The equation becomes invalid

In the equation 13 = 9 + R, what is the value of R?

• 5

• 4

• 3

• 2

What is the inverse operation of subtraction?

• Division

• Addition

• Multiplication

• Subtraction

In the equation N - 8 = 6, what is the value of N?

• 15

• 12

• 14

• 13

In the equation 25 = 16 + R, what is the value of R?

• 10

• 9

• 8

• 7