Evaluating Multiple Step Algebraic Expressions by Substitution

This video tutorial teaches how to evaluate algebraic expressions by substituting numbers for variables. It emphasizes the importance of following the order of operations: parentheses, exponents, multiplication/division, and addition/subtraction. The tutorial provides examples of evaluating expressions with a single variable and demonstrates how to substitute different values into an expression to find its value.

What is the first step in the order of operations?

• Evaluate expressions inside parentheses

• Add and subtract from left to right

• Perform multiplication and division

• Solve exponents

When substituting X = 3 in the expression 15 * X + (8 - X), what is the result after solving the parentheses?

• 3

• 5

• 8

• 15

What is the value of the expression 9 - 3 * X when X = 3?

• 9

• 6

• 3

• 0

For the expression 9 + 3 * X, what is the result when X = 3?

• 18

• 9

• 27

• 12

What is the value of 9 / 3 * X when X = 3?

• 0

• 9

• 1

• 3

If X = 4, what is the result of the expression 50 - 5 * X?

• 20

• 40

• 30

• 35

What is the final result of 50 - 5 * X when X = 10?

• 15

• 10

• 5

• 0