How To: Solve systems of linear equations by graphing

Solve systems of linear equations by graphing

In this video the instructor shows how to solve systems of linear equation by graphing. A system of linear equation is equations of two lines that are to be graphed on the same coordinate axes. Now take the first equation and write it to form y = mx + b. Now extract the value of slope m and graph the line as shown in the video. Similarly graph the equation of the second line as shown in the video. Now if the two lines intersect at a point, that point is the solution to the system of that linear equations. If those two lines do not intersect and are parallel to each other then they have no solution. Similarly they can also have infinitely many solution if one line lies on the other. This video shows how to solve a system of linear equations.

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