In this video, the addition property of equality is used to solve problems. The lesson covers an example of solving equations with a minus sign in front of the variable, such as -x=b, and how taking the opposite of both sides can help in these problems. In addition, the video shows how changing the signs of all the terms can make the equation easier to solve. The lesson concludes with a challenging problem that requires simplifying both sides of the equation and combining like terms to find the variable's value.
Part 4 of Solving Linear Equations in one variable. Covers examples solving equations using the addition property of equality, and solving -x = b, etc.