2x + 3y = 4 and 3x = 4y are typical examples of linear equations. The solutions for these come in pairs - for every possible value of x there is one value of y that will work and vice versa. If the solutions of these equations are plotted is it found that all the points lie on a straight line.
The pencast below shows the method for finding the points where the line crosses the X-axis and the Y-axis. This method is useful when you want to draw a graph of the line.
You can use this method to solve simultaneous equations, just put both lines on the same graph.
The pencast below shows the method for finding the points where the line crosses the X-axis and the Y-axis. This method is useful when you want to draw a graph of the line.
You can use this method to solve simultaneous equations, just put both lines on the same graph.
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