Understanding Equivalent Expressions

What is the first step when you are given an expression with a variable and no value for the variable?

• Use the value 1 for the variable.

• Ignore the variable and solve the expression.

• Choose any number except 0 and 1 to substitute for the variable.

• Use the value 0 for the variable.

When substituting n with 2 in the expression 4n + 3 - 1, what is the result after applying the order of operations?

• 17

• 15

• 19

• 21

In the expression 2n + 2n + 12 - 1, what is the result after substituting n with 2 and solving?

• 20

• 18

• 19

• 21

What is the result of substituting W with 2 in the expression 2W + 5 + 3?

• 15

• 17

• 14

• 16

After substituting Y with 2, which expression is equivalent to 2Y + 5 - 4?

• 2Y + 3

• 2Y + 1

• 2Y + 2

• 2Y + 4