Evaluating Expressions and Solving Equations

The video tutorial explains the difference between expressions and equations, providing definitions and examples. It demonstrates how to solve equations for variables, evaluate expressions with given values, and simplify expressions by combining like terms. Each concept is illustrated with step-by-step examples to enhance understanding.

What is the key difference between an expression and an equation?

• An equation contains only variables.

• An equation contains an equal sign.

• An expression contains only numbers.

• An expression contains an equal sign.

What is the value of x in the equation x - 5 = 6?

• x = 5

• x = 1

• x = 6

• x = 11

Which operation is used to isolate x in the equation x - 5 = 6?

• Divide both sides by 5

• Subtract 5 from both sides

• Add 5 to both sides

• Multiply both sides by 5

What is the result of evaluating the expression 2x - 2 when x = -2?

• 6

• 4

• -6

• -4

What is the first step in evaluating the expression 2x - 2 for x = -2?

• Add 2 to x

• Multiply 2 by x

• Subtract 2 from x

• Divide x by 2

How can the expression x + x + 2 + 8 be simplified?

• 2x + 10

• 2x + 8

• x + 10

• x + 2

What is the simplified form of x + x?

• 2x

• x^2

• x

• 0

What is the value of m in the equation -3m = -9?

• m = -9

• m = 3

• m = -3

• m = 9

Which operation is used to solve -3m = -9?

• Add 3 to both sides

• Multiply both sides by -3

• Subtract 3 from both sides

• Divide both sides by -3

What is the result of dividing -9 by -3?

• -3

• 3

• 0

• 9