Equations and inequalities
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Vocabulary
Parallel lines are lines that are always the same distance apart. Parallel lines never intersect. Perpendicular lines are lines that intersect at a right angle.Solving Equations: Solving equations involves finding the value of the unknown variables in the given equation. The condition that the two expressions are equal is satisfied by the value of the variable. Solving a linear equation in one variable results in a unique solution, solving a linear equation involving two variables gives two results. Solving a quadratic equation gives two roots. There are many methods and procedures followed in solving an equation. Let us discuss the techniques in solving an equation one by one, in detail. Slope: The slope of a line is a measure of its steepness. Mathematically, slope is calculated as "rise over run" (change in y divided by change in x). A system of equations consists of two or more equations with the same variables. For example, the linear equations below create a system of linear equations: |