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Web a linear equation is an equation of a straight line, written in one variable. Y 2 = 1 y = ± 1 = ± 1. Solve equations using the subtraction and addition properties of equality. Web video answers for all textbook questions of chapter 1, equations and inequalities, college algebra by numerade. Solve equations using the division and. Web introduction to systems of equations and inequalities; In this chapter, we will investigate matrices and their inverses, and various ways to use matrices to solve. Prelude to systems of equations and inequalities. Watch the video to check your solution. An equation states that two expressions are equal, while an inequality relates two different values. Substitute y = ± 1 into one of the equations and solve for x.