Answer: y = -36, x = -4
Since the equation is written as y = 3x - 24 and there are two equations, we can substitute one equation into the other and solve like that.
9x = 3x - 24
6x = - 24
x = -4
Now that we know x is -4, we find y.
y = 9(-4)
y = -36
And we can use this to solve the last equation.
-36 = 3(-4) - 24
-36 = -12 - 24
-36 = -36