Simultaneous Linear Equations
Consider two linear equations in two variables, x and y, such as
2x - 3y = 4
3x + y
We first consider the special cases of solving a pair of simultaneous linear equations when one of the two lines is either horizontal (ay = b) or vertical (cx = d); the solution in these cases is easily found by substitution.
Case one: One line is horizontal (ay = b):
Now try solving a few on your own:
Case two: One line is vertical (cx = d). The method is exactly the same as for a vertical line.
Practice this method with a few exercises: