We want to solve the system
using the . When solving a system of equations using substitution, there are three steps.
- Isolate a variable in one of the equations.
- Substitute the expression for that variable into the other equation and solve.
- Substitute this solution into one of the equations and solve for the value of the other variable.
is already isolated in Equation (I).
Let's continue by substituting
in Equation (II).
Now, to find the value of
we need to substitute
into either one of the equations in the given system. We will keep the value as a fraction to get an exact answer. Let's use Equation (I).
The solution to this system of equations is the point