Yes....substitution and elimination are two other methods...... or post on Web2.0 haha
+1224 1. Graphing: graph the system of equations and find the intersection points, which are the solutions.
2. Elimination. As an example:
x + 2y = 3 . (1)
3x + y = 4 . (2)
You can eliminate one variable by multiplying equation (2) by 2:
x + 2y = 3
6x + 2y = 8
-----------------
-5x = -5
By subtracting the equations, we have eliminated one variable, thus solving for the other.
3. Substitution. Let's use the same equations as last time. In equation (1), solve for x in terms of y:
x + 2y = 3 -----> x = 3 - 2y
Plug this in the other equation:
3x + y = 4
3(3 - 2y) + y = 4
Thus, we can solve for y, and in turn, solve for x.
