Forming systems of equations with different numbers of solutions (Full video)

Khan Academy

Supporting grades: 8

Description: Sal demonstrates how to create a system of equations with infinitely many solutions. So you're going to have infinitely many solutions if essentially both of these equations are describing the same line. If we were to put this into slope-intercept form, you would have 5y is equal to 2 minus 4x. And then if we divide both sides by 5, you get y is equal to negative 4/5 x plus 2/5.

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