This resource has been contributed by Winpossible, and can also be accessed on their website by clicking here - Getting Started
This mini–lesson introduces systems of linear equations and explains related concepts. A system of equations is a set of equations in one or more variables, and its solution is a set of values for its variables such that when these values are substituted into the equations, the equations are ‘satisfied’ i.e. the results are equalities. If this seems too complicated, it really isn't -- when you hear the instructor explain it to you in the video, you'll see how easy it is. Sometimes, text based explanations of mathematical concepts seem complicated, but when you actually hear from someone what they mean, they are not that difficult to understand!
We'll also look at inequalities here -- an inequality, unlike an equation, does not use the = symbol, but instead uses one of these symbols: <, >, ?, ?. For example, 2x + 3y ? 5. In this inequality, whatever you plug in for values of x and y, the expression is only valid if the value of 2x + 3y is less than 5 or equal to 5.
This FREE mini-lesson is a part of Winpossible's online course that covers all topics within Algebra I. Click on the video below to go through it. If you like it, you can buy our online course in Algebra I by clicking here.