To solve the system of equations, we can use the method of substitution or elimination. First, let’s use the elimination method. We have the following equations:

We can add both equations to eliminate . Adding both equations gives us:

Combining like terms results in:

Now, solving for , we get:

Now, substitute back into either of the original equations to find . We’ll use the first equation:

Subtract 21.6 from both sides:


Now, divide by -3:

So the solution to the system of equations is and .