Absolute value is presented as representing distances on a number line. The concept of opposite (additive inverse) is also demonstrated on a number line. Professor Perez provides an explanation of this in his virtual classroom. [8:26]

Demonstrated in this lesson is that a variable, like a number, has inverses; and what to do with those variables when they have coefficients. It is 10 of 14 in the series titled "Moving the Variable."

Demonstrated in this lesson is that a variable, like a number, has inverses; and what to do with those variables when they have coefficients. It is 3 of 14 in the series titled "Moving the Variable."

Demonstrated in this lesson is that a variable, like a number, has inverses; and what to do with those variables when they have coefficients. It is 4 of 14 in the series titled "Moving the Variable."

Demonstrated in this lesson is that a variable, like a number, has inverses; and what to do with those variables when they have coefficients. It is 5 of 14 in the series titled "Moving the Variable."

Demonstrated in this lesson is that a variable, like a number, has inverses; and what to do with those variables when they have coefficients. It is 9 of 14 in the series titled "Moving the Variable."

Demonstrated in this lesson is that a variable, like a number, has inverses; and what to do with those variables when they have coefficients. It is 1 of 14 in the series titled "Moving the Variable."

This lesson demonstrates how to use the correct format to find the value of a variable in an addition problem. It is 12 of 17 in the series titled "Solving Addition Equations."

This lesson demonstrates how to use the correct format to find the value of a variable in an addition problem. It is 3 of 17 in the series titled "Solving Addition Equations."

This lesson demonstrates how to use the correct format to find the value of a variable in an addition problem. It is 7 of 17 in the series titled "Solving Addition Equations."

Demonstrated in this lesson is that a variable, like a number, has inverses; and what to do with those variables when they have coefficients. It is 7 of 14 in the series titled "Moving the Variable."

This lesson demonstrates how to use the correct format to find the value of a variable in an addition problem. It is 14 of 17 in the series titled "Solving Addition Equations."