Sure, here's how you can solve the system of equations by substitution:
Since we know that x is equal to -3, we can substitute -3 for x in the second equation to get:
6(-3) - 5y = 22
Simplifying the equation, we get:
-18 - 5y = 22
Adding 18 to both sides, we get:
-5y = 40
Dividing both sides by -5, we get:
y = -8
Therefore, the solution to the system of equations is:
x = -3
y = -8