We want to solve the system
using the . We then need to eliminate one of the variable terms by adding or subtracting the equations. We can see that the
-terms in this system will eliminate each other if we subtract Equation (II) from Equation (I). Let's do that!
by solving the resulting equation.
by substituting the value of
into either of the original equations and solve the resulting equation for
Let's use Equation (I).
The solution to the system of equations is